While the peak years for female fertility are declining, the trend for women to put off having children until their late 20s or early 30s has a high fertility rate.
Is childbirth more difficult in your 30s?After you reach your mid-30s, pregnancy is something to think about more. Women who are older have a higher risk of miscarriage or stillbirth. They are more likely to experience preeclampsia, gestational diabetes, and to give birth to a very little child.
When do women start having children?The prime reproductive years for women are from their late teens to late 20s. Age 30 marks the onset of a reduction in fertility (the capacity to become pregnant). Once you're in your mid-30s, this drop accelerates.
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In a body of water, a fish remains at a constant depth while motionless. In the same body of water, a person sinks while motionless. Why? more than one answer may be true.
A person sinks in a water body while a fish does not because the person has a higher density than the water, the fish displaces less water and also it has less volume, and it has a lesser density than the water.
A fish stays immobile at the same depth in a body of water. A person sinks in the same body of water while not moving. The idea has to do with mass, density, and volume. As a result of having a higher mass and volume than water, a person has a higher density than a fish because the latter displaces less water than the former. A person also has a higher mass than a fish. Therefore, option A, B, D, and E are correct. The mass per unit volume formula is used to compute density. It is described as the total mass that a body contains in relation to its volume. It can be represented as:
Density = mass/volume
This is consistent with the fact that fish have streamlined bodies in addition to their bodies not having any. Human bodies are not streamlined. In addition to its air bladder, a fish has gills that allow it to breathe underwater. This allows fish to survive.
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Complete question is:
In a body of water, a fish remains at a constant depth while motionless. In the same body of water, a person sinks while motionless. Why? more than one answer may be true.
Group of answer choices
The person has higher density than the water.
The fish displaces less water than the person.
The fish has a lower density than a person.
The fish has less volume than the water it displaces.
The person has more mass than the fish.
The fish has lower density than the water.
The person has more volume than the fish.
we could use genomic dna for this cloning project instead. for this application, cdna would work better. choose which reasons we would want to use cdna, and which reasons genomic dna would work better.
Genome DNA:
the whole genetic information of an organism is represented by genomic DNA. The genomes of virtually all species are made up of DNA, with the exception of certain viruses, which contain RNA genomes.
Reason to use genome DNA:
The human genome is 3.2 billion base pairs long.The majority of the genome (97%) is non-functional or non-coding.The first human genome sequencing took 13 years and cost $1 billion USD to complete.cDNA:
a complementary DNA to a given RNA that acts as a template for DNA synthesis in the presence of reverse transcriptase The First Known Application of cDNA.
Reason to use cDNA:
You have the ability to clean it. Changes to the sequence are possible. You may then put it back into the genome of another creature, such as yeast, using sophisticated molecular tools and enzymes. Yeast is extremely efficient in producing a large number of proteins. And if you inject insulin cDNA into its genome in the correct location and arrangement, it will begin producing insulin for you. This is one method through which scientists can create and test novel forms of insulin with features that may be useful in the treatment of diabetes.
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The cell membrane is composed of a phospholipid bilayer containing proteins and carbohydrates. Choose three of the statements that accurately reflect the structure and its function.
Answer:The cell membrane is composed of a phospholipid bilayer containing proteins and carbohydrates. Choose ALL of the statements that accurately reflect the structure and its function. 1. Membrane proteins may be enzymes to catalyze metabolic reactions within the cell. 2. Membrane proteins may contain cholesterol to serve as identification tags for other cells. 3. Channel proteins allow a specific molecule to cross the cell membrane that is unable to cross the phospholipid bilayer unassisted. 4. Receptor proteins bind to ligands, initiating cell signaling pathways. 5. Molecules that are large or nonpolar must use membrane proteins for transport
describe the chronologic development of vascular tissue. include various plants lineages associated with these different structures.
Plants have a highly developed vascular system.
It has made a significant contribution to the development of terrestrial plants.
The development of the vascular system is a dynamic process in plants, but it is also adaptable to environmental changes.
In early embryos, asymmetric cell division results in the formation of perivascular cells. Procambial cells, which serve as vascular stem cells, develop into a a variety of vascular cells.
The creation of vascular patterns, in which the arrangement of the xylem, phloem, and procambium is species-specific, depends on the interaction between auxin and cytokinin.
The progressive development of vascular tissues is aided by the hierarchical expression of multiple transcription factors. These transcriptional regulators can occasionally build feedback loops with plant hormones.
Hormones, peptides, and miRNAs are examples of non-cell autonomous signals that play a role in the development of vascular tissue.
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would any populations begin to thrive?
Answer:Global population growth and the destructive consumption habits of high-wealth countries put pressure on biodiversity and human communities, exacerbating food and water shortages, reducing resilience in the face of climate change, and making it harder for vulnerable groups to rise out of intergenerational poverty.
Explanation:
The Center has been working to address the connection between human population pressure and the extinction crisis since 2009. Our innovative campaigns focus on commonsense solutions such as gender empowerment, the education of all people, universal access to all forms of sexual and reproductive healthcare, sustainable and equitable lifestyle choices, an economy that doesn’t rely on endless growth, and a societal commitment to improve living conditions for all species.
which of the following would best characterize the organisms that inhabit the biome? responses habitat specialists would be most abundant, because they have broad niches. habitat specialists would be most abundant, because they have broad niches. generalists would be most abundant, because the resources available would be constantly changing. generalists would be most abundant, because the resources available would be constantly changing. generalists that feed only on animals would be more abundant in the summer months, while generalists that feed only on plants would be more abundant in the winter months. generalists that feed only on animals would be more abundant in the summer months, while generalists that feed only on plants would be more abundant in the winter months. specialists that live in trees would be more abundant in the summer months, whereas specialists that live in caves would be more abundant in the winter months.
Generalists would be most abundant, because the resources available would be constantly changing.
What is a biome?A biome often referred to as a major life zone, is a region with populations of plants and animals that have evolved together to survive in that specific environment. It is the largest global biotic unit and contains a number of communities with names derived from the dominating geographical characteristics of the area, such as grasslands, deserts, or woods. We can determine the type of life that exists in a biome by looking at factors such as temperature, soil, and water.
Terrestrial, freshwater, and marine biomes are the three categories into which biomes can be divided. Grasslands, deserts, and tropical woods are all examples of terrestrial biomes. Polar freshwaters, sizable lakes, tropical and subtropical coastal rivers, temperate coastal rivers, and many more are examples of freshwater biomes. Continental shelves, tropical coral, and kelp forests are examples of marine biomes.
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Since the resources at hand will be continually shifting, generalists would be in great supply.
What two key variables would be the most reliable indicators of the population's standard of living?A population's capacity for expansion is greatest when a sizable portion of its members are in the pre-reproductive and reproductive cohorts. The two most crucial indicators for assessing a nation's general health are infant mortality and life expectancy.
What three qualities do a biome possess?Biomes. An place is categorized as having a certain biome based on the species that inhabit it. Scientists can identify a biome by defining the range of temperatures, the kind of soil, the amount of light, and the amount of water that are distinctive to that location. These factors create niches for particular species.
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Mutalistic microorganisms in the gut are the most critical for the mammals that consume.
Mutualistic microorganisms in the gut are the most critical for the mammals that consume dairy and lactose containing foods.
Mutualistic microorganisms are those that live in the body of an organism and provide some kind of benefit to that organism. In return the organism provides the microorganism with shelter and food. For example, E. coli is the gut bacteria that helps in digestion of lactose in mammals.
Lactose is a carbohydrate. It is particularly a disaccharide formed by the bonding between galactose and glucose subunits. It is present in milk and milk-related products such as cheese, cream, etc. Some people are not able to digest lactose in there body, a condition called lactose intolerance.
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45 points for this.
Multiple parts
Answer:
evaporation, condensation, cloud formation, precipitation
Whats the fate of pyruvate after its produced during glycolysis?
The fate of pyruvate depends upon the availability of oxygen after glycolysis. In the presence of oxygen, pyruvate enters the mitochondria to generate reducing equivalents in the form of NADH and FADH2. And in the absence of oxygen, pyruvate exhibits fermentation.
Glycolysis is the process in which the breakdown of glucose into pyruvate occurs. This process occurs in the cytoplasm of all the cells and does not require oxygen. Glycolysis is a 10 step process where there is a net gain of 2 ATPs.
Fermentation is the process that occurs in anaerobic condition. It also happens in the cytoplasm of the cell. The products of fermentation can be either lactic acid or ethanol.
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which of the following is not found in the dermis layer of the skin? select an answer and submit. for keyboard navigation, use the up/down arrow keys to select an answer. a sensory receptors b hair follicles c capillary network d all are found in the dermis
Sensory receptors, hair follicles, and capillary network all are found in the dermis layer of the skin.
So, the correct option is D.
Blood veins, nerve endings, glands, and hair follicles are all located in the dermis. The dermis' connective tissue is made up of a variety of cell types, including fibroblasts, macrophages, adipocytes, mast cells, Schwann cells, and stem cells. In addition to connective tissue and blood arteries, the dermis also contains hair follicles, nerves, sweat and oil glands, and other components. The papillary dermis, the uppermost thin layer, and the reticular dermis, the lowermost thick layer, make up this structure.
The epidermis, dermis, and subcutaneous tissue are shown in this illustration of the skin's anatomy. The middle skin layer on your body is called the dermis. It serves a variety of functions, such as guarding against harm, supporting the epidermis, allowing you to experience different sensations, and even growing hair and sweat.
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Which type of stem cells have the ability to become any other type of body cell?
Answer:
Embryonic Stem Cells (ESCs)
Explanation:
Which type of air mass is the most responsible for the cold weather that travels from canada to north carolina during the winter?.
The continental polar air mass is the most responsible for the cold weather that travels from Canada to north Carolina during the winter.
Air mass is the volume of the air which is measured according to its temperature and humidity. A certain air mass will have the same temperature and humidity all across it. When two different air masses interact they cause the change in weather.
Weather is the phenomenon that explains the exact climatic condition of a smaller area. Weather is considered by taking into account the temperature of the area along with the conditions like humidity, cloudy, windy, etc. Weather is a small time phenomenon as it changes from time to time and place to place.
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What is the difference in the concentration of molecules in two areas across a membrane.
Answer: For cell transport, diffusion is the movement of small molecules across the cell membrane. The difference in the concentrations of the molecules in the two areas is called the concentration gradient.
Explanation:
which term describes the tertiary structural organization of chromosomal dna that allows the long strand to be packed and fit into the cytoplasm of the cell? double helix telomere base pairing supercoiling centromere
Supercoiling term describes the tertiary structural organization of chromosomal dna that allows the long strand to be packed and fit into the cytoplasm of the cell
What does supercoiling mean?A higher-order DNA structure is described by DNA supercoiling. Two complimentary strands are wound around one another and around a shared helical axis to form the double-helical structure of DNA.Supercoiling happens when the molecule twists around itself to release the helical stress. Positive supercoiling results from overtwisting, whereas negative supercoiling results from undertwisting. In a circular model, twist can be changed by severing the circle, over- or undertwisting, and then re-connecting the ends.Small intranucleosomal DNA loops arise in conjunction with RNA polymerase II (Pol II) transcription through chromatin. DNA supercoiling builds up when Pol II is trapped inside a tiny loop,To learn more about Supercoiling refer to:
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The difference between the smooth and rough er is the _______ that are attached to the outside of the ________ er.
Difference between smooth and the rough end of plastic reticulated is that ribosomes are attached to the outside of the rough ER
What is the difference between rough and smooth ER?The difference between rough ER and smooth ER is the presence of ribosomes. When ribosomes attach to the surface of an ER then it gives a rough appearance and hence it is called Rough ER. Smooth ER does not have ribosomes on its surface but is attached to its membrane.
The endoplasmic reticulum can either be smooth or rough, but its function is to produce proteins for the rest of the cell to function. The rough ER has ribosomes, which are small and round organelles whose function it is to make those proteins. Function of smooth ER is the synthesis of lipids, steroids and carbohydrates.
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Atherosclerosis is simply the acculation of lipods within the artery.
a. True
b. False
The given statement is (b) False i.e. Atherosclerosis is simply the accusation of lipids within the artery.
The buildup of lipids and fibrous components in the major arteries is a hallmark of the degenerative illness known as atherosclerosis.A pattern of the disease known as arteriosclerosis called atherosclerosis occurs when lesions begin to form on the arterial wall. Because plaque has accumulated due to these lesions, narrowing may result. Usually, there are no symptoms at first.Atherosclerosis is a chronic condition that goes years without showing any symptoms. Stable and unstable atherosclerotic lesions are the two main classifications of atherosclerotic plaques (also called vulnerable).Atherosclerosis steadily takes hold when plaque is formed in your blood by cholesterol, fat, blood cells, and other elements. Your arteries narrow as a result of plaque buildup. As a result, the body's essential organs receive less blood that is oxygen-rich. a healthy artery and a plaque-filled artery.
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In the reactions of photosynthesis, simple sugar molecules are manufactured in the.
In the reactions of photosynthesis, simple sugar molecules are manufactured in the chloroplasts.
Plants utilize carbon dioxide and water to convert them into energy and oxygen. As a result, the water turns into oxygen and carbon dioxide into glucose. After storing energy in the glucose molecules, the plant releases the oxygen back into the atmosphere.
Chlorophyll
The purpose of the microscopic organelles called chloroplasts, which are found inside plant cells, is to store sunlight energy. Plants are green because of chlorophyll, a pigment that absorbs light and is located in the thylakoid membranes of the chloroplast. During photosynthesis, chlorophyll absorbs energy from blue and red light waves while reflecting green light waves, providing the impression that the plant is green.
The two main stages of photosynthesis are light-dependent reactions and light-independent reactions, despite the fact that there are many other steps. As suggested by its name, the light-dependent reaction takes place inside the thylakoid membrane and requires a steady stream of sunlight. Chlorophyll absorbs the energy of the light rays and converts it into chemical energy in the form of the molecules ATP and NADPH. The light-independent reaction is a stage of the Calvin Cycle that doesn't require light and occurs in the stroma or area between the chloroplast and thylakoid membranes.
Using the energy from the ATP and NADPH molecules, carbon dioxide is transformed into carbohydrates like glucose during this phase.
C3 and C4 are used in photosynthesis. Not all forms of photosynthesis, though, are created equal. Two of the numerous types of photosynthesis are C3 and C4 photosynthesis. C3 photosynthesis is used by most plants. It involves the Calvin Cycle creating the three-carbon molecule 3-phosphoglyceric acid, which later turns into glucose. The Calvin Cycle, on the other hand, causes a four-carbon intermediate product produced by C4 photosynthesis to break down into carbon dioxide and a three-carbon molecule. The advantage of C4 photosynthesis is that it produces larger levels of carbon, allowing plants to thrive in environments with little water or light.
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What is the difference between a molecule and a compound.
Question 5 options:
In a molecule, two or more same atoms are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected.
In a molecule, two or more same molecules are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected.
In a molecule, two or more same atoms are connected with the chemical bonds. However, in a molecule, two or more, same or different atoms and molecules are connected.
In a molecule, two or more same compounds are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected.
Answer:The correct answer is the first one
Explanation:
In a molecule, two or more same atoms are connected with the chemical bonds. However, in a compound, two or more, same or different atoms and molecules are connected. ----btw pls give me the brainy thing<3
If pacific field male crickets in hawaii attract females by rubbing their wings together to sing, why is it that in some places up to 90% of the males no longer sing? how could this have evolved?.
If pacific field male crickets in Hawaii attract females by rubbing their wings together to sing, HMS Beagle.
Male crickets have shorter, sturdier wings with hard underside surfaces called a record. The pinnacle of the wing has a formation known as a scraper. To make his chirping tune, the male rubs the scraper of 1 wing in opposition to the file on the bottom of the other.
Even though both men and women have two cerci, the simplest women have an ovipositor. it can appear like third cerci, or appear to be an extraordinary length. lady crickets use this organ to put eggs into the soil. best male crickets chirp—they do that to attract a lady mate
.
Male crickets are the communicators of the species. The girls watch for the songs of the males to spur on the mating ritual. girl crickets do not chirp. males make a chirping sound by using rubbing the edges of their forewings collectively to name lady friends. This rubbing together is referred to as stridulation.
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What is the name for the chemicals that flood your body during periods of great stress, when your body becomes cortisol resistant and can cause damage to healthy cells if there is a storm of them?.
Cortisol is a chemical substance that causes stress in the body.
Cortisol, a major stress hormone, increases the level of sugar (glucose) in the bloodstream, improves the brain's use of glucose, and increases the availability of substances for tissue repair. Cortisol also dampens irrelevant or harmful functions in fight-or-flight situations.
Stress hormones include not only Cortisol which is the main human stress hormone but alsoCatecholamines such as adrenaline and noradrenaline. Vasopressin. Your body constantly produces tears to protect your eyes from irritation and keep them moist. If emotions cause you to cry, your tears contain additional ingredients. Cortisol is a stress hormone. Prolonged crying can wash away stressors.
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Are inherited traits adaptable? Why or why not?
Answer: Hope this helps!
Explanation:
Inherited characteristics are the characteristics that makes plants and animals who they are. These characteristics are passed down from generation to generation. The amazing thing about these characteristics are that they can change over time. This is known as adaptation. This means that the plant or animal have evolved in such a way that it is better suited to live in its environment. These type of changes get passed down to offspring of that animal or plant and help the new animal or plant survive better.
How is energy transferred from a plant to a person?
I need this right now, please. Whoever answers first I'll mark the brainiest.
Answer:Through the food chain
a patient was diagnosed to possess a mutation in an er-resident protein in which the er-signal sequences of the protein were inappropriately deleted and instead replaced with a mannose-6-phosphate during protein synthesis and posttranslational modification. what is the likely fate of this mutant protein?
The protein would be directed to lysosomes, secreted by exocytosis, and wouldn't be glycosylated. It would also never enter the Golgi complex.
What Is a Protein?
The body is made up of protein, which may be found in almost every organ, tissue, and body part, including muscle, bone, skin, and hair. It contributes to the production of hemoglobin, which carries oxygen in the blood, and enzymes, which conduct important biochemical reactions.
What is the real benefit of consuming protein?
Your muscles' primary building material is protein. Therefore, eating enough protein will help you keep your muscle strength and encourage strength growth when you engage in strength exercise. Eating a lot of protein can help build muscle mass and strength, as according numerous studies.
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what is the function of the retinal pigmented epithelium? provide nutrients and oxygen to the retina. provide nutrients and oxygen to the lens and cornea. absorb light that enters the eye. secrete vitreous humor. secrete aqueous humor.
The human retinal pigment epithelium (H-RPE) consists of pigmented cells located between the neuroretina and the choroids. The H-RPE is produced from hexagonal cells organized into a monolayer that is densely full of pigment granules.
The retinal pigment epithelium is a fundamental aspect of the retina that performs essential roles in visible features. harm to the shape and characteristic of the retinal pigment epithelium ends in the diffusion of retinopathies, and there may be currently no healing remedy for these disorders.
The human retinal pigment epithelium (H-RPE) includes pigmented cells located among the neuroretina and the choroids. The H-RPE is constituted of hexagonal cells organized into a monolayer that is densely filled with pigment granules.
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Mitosis can occur in both haploid and diploid cells, but meiosis cannot occur in haploid cells. Why not?.
Because the cell is still haploid after mitosis, haploid cells can undergo mitosis. While the haploid cell will only contain half as many chromosomes after meiosis.
Can a haploid cell go through meiosis? Why, if at all, can a haploid cell undergo mitosis?Haplodiploid cells cannot undergo meiosis. Gametes are created by mitotic division in a haploid organism (n). After fertilization, these gametes (n) are joined to create a diploid zygote. This zygote or diploid cell then goes through meiosis to form a haploid organism once more.
In both diploid and haploid cells, can mitosis occur?A cell can go through mitosis whether it is haploid or diploid. A diploid cell goes through mitosis to create two genetically identical diploid daughter cells, whereas a haploid cell goes through mitosis to create two genetically identical haploid daughter cells.
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demonstrate that change in heat causes change in temperature
Answer:
When a system absorbs or loses heat, the average kinetic energy of the molecules will change. Thus, heat transfer results in a change in the system's temperature as long as the system is not undergoing a phase change.
in which way does the b-cell population that participates in a secondary adaptive immune response differ from the b-cell population that participates in a primary adaptive immune response?
Answer: a. Antigen-specific B cells in a secondary response outnumber those in a primary response by 10- to 100- fold.
Explanation:
In a secondary reaction, the number of antigen-specific B cells is 10- to 100-fold greater than in a first response.
What is antigen?Antigen is defined as a substance that triggers the creation of antibodies and elicits an immunological response. This indicates that your immune system is attempting to combat the chemical because it does not recognize it. A substance from the environment, such as chemicals, germs, viruses, or pollen, can behave as an antigen.
The primary immune response happens in response to the first interaction with the antigen, whereas the secondary immune response happens in response to the second and subsequent exposure to the same antigen.
Thus, in a secondary reaction, the number of antigen-specific B cells is 10- to 100-fold greater than in a first response.
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what environment stimulates evolution of drug-resistant pathogens?
The presence of an enzyme called penicillinase results in drug-resistant pathogens.
What causes drug-resistant pathogens?
Misuse and overuse of antimicrobials are the main drivers in the development of drug-resistant pathogens.
What is the function of penicillinase?
A bacterial strain exposed to penicillin may produce an extracellular enzyme called penicillinase which leaves the bacterial cell and degrades the penicillin around it by hydrolyzing the cyclic amide bond in the beta-lactam ring of penicillin and thus inactivates the antibiotic.
Thus, the presence of the enzyme penicillinase results in drug-resistant pathogens.
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which of the following is true about ectotherms? answer they maintain their body temperature internally they include mammals and birds they include reptiles and amphibians
Ectotherms rely mostly on outside heat sources, and the environment's temperature affects how hot or cold they are inside.
Which statement concerning ectotherms is correct?The truth about ectotherms is that they expend more energy on reproducing than on producing heat. Ectotherms will devote more energy to reproduction than endotherms since they do not expend much energy to maintain a constant internal body temperature.
Are ectotherms capable of maintaining body temperature?Ectotherms are creatures whose body temperatures are typically similar to those of their surroundings. Their body temperature cannot be controlled internally. Ectotherms, such as lizards and snakes, adopt the ambient temperature rather than producing metabolic heat to keep their bodies at a constant temperature.
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Explain why it may have been difficult to discover pond water organisms from pond water sample under the microscope comparing to cheek cell sample and leaf sample?
It may have been difficult to discover pond water organisms from pond water sample under the microscope comparing to cheek cell sample and leaf sample because of the large area and involved and the cheek cell and leaf sample being a living tissue.
What is a Microscope?This is referred to as a laboratory equipment which is used in the enlargement of objects and cells and ensures that very small organisms can be seen and observed.
Living cells such as cheek cell and leaf sample are what the organisms mostly feed on which is why it is easy to see and observe them when compared to pond water.
Pond water also has a very large surface area and the sample gotten may not possess any organism which is why it may be difficult and is therefore the reason why it was chosen as the correct choice.
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