Frozen water is less denser than liquid water so that's why ice floats on the water in cold areas.
Is frozen water more or less dense than liquid water?Ice is less dense than liquid water because when the water becomes solid due to low temperature, the density of ice become decreases. Due to less density, the ice floats on the water surface.
Water is attracted due to its polar nature so adhesive forces pull the water toward other molecules. Water is transported in plants through both cohesive and adhesive forces. These forces pull water and the dissolved minerals from the roots to the upper parts of the plant.
So we can conclude that frozen water is less denser than liquid water so that's why ice floats on the water in cold areas.
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Can someone help me with this please? Match the following organelle to its function.
Answer:
lysosomes
endoplasmic reticulum
vacuoles
mitochondria
cytoplasm
golgi apparatus
ribosomes
chloroplast
Explanation:
in order of the functions listed
Which of the following statements about the stomach is true?
O
Pepsins are the digestive enzymes that enable the stomach to break
down proteins.
O
Amylase is the pasty substance that's created when stomach enzymes
and food mix together.
O
The stomach receives chyme from the esophagus, which it turns into
bolus before passing it on to the small intestine.
The stomach processes nutrients, absorbs water and removes any
toxins created during chemical digestion.
Why are models often used in science
Answer:
Models use familiar objects to represent unfamiliar things. Models can help you visualize, or picture in your mind, something that is difficult to see or understand. Models use familiar objects to represent unfamiliar things.
Explanation:
Models can help you visualize, or picture in your mind, something that is difficult to see or understand. Models can help scientists communicate their ideas, understand processes, and make predictions
A population of sixteen emu grew to thirty-nine in one year. After two years, the population had grown to forty-eight. The maximum number of emu that the environment can support is approximately sixty due to limited resources such as food and water.
Answer:
The largest number of emu that the environment can support is about sixty.
Explanation:
What would the most accurate model for the theory of evolution look like?
Answer:
Comparing DNA
Explanation:
Darwin could compare only the anatomy and embryos of living things. Today, scientists can compare their DNA. Similar DNA sequences are the strongest evidence for evolution from a common ancestor.
What element is missing from the cellulose molecule which is needed to make collagen?
The missing element that is needed to make collagen in cellulose is vitamin C, zinc, copper and manganese to make the triple helix.
What is collagen?Glycine, proline, and hydroxyproline are the three amino acids that make up collagen.
Cellulose synthesis is gaining popularity not only because cellulose is a major component of plant cell walls, but also because it has the potential to become a major resource for renewable biofuels.
The cellulose structure is made up of long polymer chains of glucose units connected by a beta acetal linkage.
The image on the left depicts a very small section of a cellulose chain. The monomer units are all beta-D-glucose.
Amino acids are the building blocks of proteins. These amino acids form protein fibrils with a triple helix structure.
To form the triple helix, your body also requires adequate amounts of vitamin C, zinc, copper, and manganese.
Thus, the missing elements are vitamin C, zinc, copper and manganese.
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PLEASE HELP!!!
Part D
Question
Next, you’ll build a simulation based on what you think will happen because of natural selection.
Here are two considerations:
Some individuals with harmful characteristics can still successfully reproduce, but they have an overall lower chance of doing so compared to organisms with neutral or beneficial traits.
Natural selection may affect distribution of traits. It’s possible that harmful traits could eventually disappear from the gene pool.
Don’t worry about precise population numbers. Based on your understanding of natural selection, you’ll be modeling only one scientifically plausible trend that can occur. There are several correct variations of this diagram. You’ll explain the justification for your choices in part E.
Assume that these plants have a life expectancy of about one year, but the rate of reproduction keeps their population consistently around 2,500 organisms. Using the same elements you used in part C, draw simulations for year 5 and year 10. Clearly label each simulation.
According to natural selection process, the trend that will occur is that the number of organisms with harmful characteristics will decrease while organisms with neutral or beneficial traits will increase in the plant population
What is natural selection?Natural selection is the process by which organisms with favorable features and characteristics that enable them to adapt to their environment survive while those with unfavorable traits die off.
In a changing environment, it will be observed that the organisms with the most favorable traits will be the most dominant in the environment.
Therefore, for the Year 5 and Year 10, the most likely trend that will occur is that the organisms with harmful characteristics will be decreasing in the plant population while organisms with neutral or beneficial traits will likely be increasing in number.
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Which conditions are necessary for the diffusion of a substance to occur across a membrane
How come the human body does not absorb water completely? In other words; why is it that even though the water could be the best possible in terms of purity, the kidneys still need to filter it? What is there to filter if the water is completely clean and pure? Shouldn't all that water simply be absorbed by all the cells in our organism?
Answer:
Because it's job of kidney to filter out everything passing through it.
Explanation:
logical answer:
it's the job of kidney to filter every thing which oasses through it. How can your kidney know that the water you had drink is pure . Does your kidney have brain ?? likewise nothing is 100% perfect in this world , the water you drink is also not 100% pure.
Knowledgeable Answer:
Human body doesn't absorb all water completely because some water is filtered from our kidney to maintain overall fluid balance,to
regulate and filter minerals from blood, to
remove waste material and toxic substances. and it's the function of kidney to filter everything hich passe through it and if it stop filtering then human body doesn't work properly.
HOPE IT HELP ...... BUT VERY LONG SNSWER HAHAHAHELP ! ILL MARK BRAINLIEST !!!
Answer:
destruction of natural habitats
Explanation:
First let's define our main terms or each answer choice.
1)Decreased deforestation - Deforestation is the action of clearing mass amounts of trees for human use such as farms, buildings, houses etc. So this answer is basically saying that as the human population increased the amount of trees that get destroyed will decrease.
2)Destruction of natural habitats - Natural habitats is simply the natural home of animals. So this answer is saying as the human population increases the more number of animals natural homes will be destroyed
3)Unchanged climate - Climate is basically the long term weather of an area. So this answer choice is saying that as the human population increases the climate will remain unchanged.
4)Increased biodiversity - Biodiversity is the different kind of life on earth usually regarding a specific habitat or ecosystem. So this answer choice is essentially saying that as the human population increases the types of life on earth increases.
What comes with increased human population?
As the human population increases the need for food, houses, water, jobs etc increases as well. Keep that in mind while looking at the answer choices.
Determining the answer
Why the answer isn't A
Rereading 1) and then what comes with increased human population we can most definitely rule out A. As human population increases the need for houses and jobs increases. In order to have a good enough supply of wood and land for these houses and buildings for these jobs, deforestation must occur. So as human population increases deforestation would increase as well.
Why the answer is B.
Rereading 2) and then looking at what comes with increased human population we can maybe say that B is correct. Looking back at the previous section we've already identified that mass deforestation must occur to satisfy the needs for wood and land for houses and jobs for the increased population. As we know many animals probably live in these forests and inside of the trees so many of these animals homes would be destroyed resulting in the destruction of natural habitats ( animals homes )
Why the answer isn't C
After rereading section 3) and what comes with increased human population we can rule out C. If an increase in human population results in deforestation the amount of CO2 released into the air increases as well. If you didn't know trees absorb CO2 which is bad for the atmosphere. Once destroyed the trees release the CO2 that they have absorbed. CO2 and other green house gases create holes in our atmosphere leading to a change in climate as the suns radiation travels through these little holes. This results in a change in temperature, increased natural disasters and the melting of ice on the poles which also leads to increased temperatures. Deforestation isn't the only cause of this ( gasoline from cars, burning of fossil fuels , pesticides and many other human caused actions result in this ). These are all human caused things so if the human population increases the amount of green house gase emissions would likely increase as well meaning the climate would no remain unchanged.
Why the answer isn't D
After reading section 4) as well as the section titled "why the answer is B" we can rule out D. In order for an increase in biodiversity to occur, natural habitats must be preserved ( remain untouched ) if deforestation occurs then natural habitats will be destroyed and biodiversity will never increase as many animals may not be able to find another sustainable habitat. Not only that but the question asks about a negative affect and biodiversity is a good thing.
Describe two ways of measuring biodiversity.
Answer:
canopy fogging and quadrat sampling
Explanation:
Scientists use several methods to measure biodiversity. These include canopy fogging, quadrat sampling, transect sampling, and netting. The method used depends on the types of organisms ecologists are counting and on the habitat.
For this assignment, you will conduct research to find the actual sizes of the Sun and the planets. Then, you will use an online solar system model calculator to determine the scaled sizes of these celestial bodies. Finally, you will use this information to create a scale model of the solar system.
The assignment is not found here but the biggest planet in the solar system is Jupiter whereas the Earth is the fifth largest planet.
What is the solar system?The solar system is a group of planets and other celestial bodies that orbit around our star, the Sun.
The solar system has a medium-size compared with other stellar systems and gaseous planets (e.j., Jupiter) are the largest than rocky planets (e.g., Earth).
In conclusion, the assignment is not found here but the biggest planet in the solar system is Jupiter whereas the Earth is the fifth largest planet.
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Please Answer Correctly As This Is For My Project.
1. What are the unique characteristics of the macromolecule subunit and macromolecule you explored?
2. Describe how the subunit you modelled chemically combines with other subunits to form a macromolecule.
3. What are the functions of the macromolecule you explored?
4. Summarize the relationship between the structure of your subunit and the function of the macromolecule it forms.
Answer:
1. Macromolecules are typically BIG molecules, and they truly are the building blocks of cells. Macromolecules are generally built by combining many single units, or monomers, into larger units, called polymers.
2.polymers which are long chains of subunits called monomers.
3.Gigantic molecules, called macromolecules, populate a cell and provide it with important functions for life. For example, macromolecules provide structural support, a source of stored fuel, the ability to store and retrieve genetic information, and the ability to speed biochemical reactions.
4.Polymers are macromolecules, but not all macromolecules are polymers. The main difference between a polymer and a macromolecule is that polymers contain repeating units that represent monomers whereas not all macromolecules have a monomer in their structure
Explanation:
transportation of seedling is not done for
1 rice
2 maize
3 onion
4 brinjal
Answer:
answer number 3 onion is correct answer
What part of the reproductive system is highlighted below? A. Vas deferens B. Urethra C. Seminal vesicles D. Epididymus
The highlighted part in the below diagram of the male reproductive system is Epididymus. The correct option is D.
What is Epididymus?The highlighted part in the reproductive system is the epididymis, it is located with vas deferens in close proximity to each other and are involved in the transport and storage of sperm.
The urethra and seminal vesicles are also important components of the male reproductive system, but they are not typically highlighted in diagrams or illustrations of the reproductive system.
Each testis has a little, tightly coiled tube linked to it (the male sex glands that produce sperm). Male reproductive cells known as sperm travel from the testicles into the epididymis, where they mature and are then stored.
Therefore, the correct option is D.
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You have been working in the garage, adding a coat of varnish to a piece of furniture. You wipe your hands on a shop rag. Because Varnish, is flammable, which waste category does the rag now belong to?
A: Ignitable
B: Corrosive
C: Reactive
D: Toxic
Answer:
A: Ignitable
Explanation:
Remember, ignite means ability to basically catch fire. Since varnish is flammable (can catch fire), it must go in ignitable waste
20 points
Describe the origin and insertion points for the large forearm muscle
Is this right if not please tell me the right answer!
______________If blood temperature rises too high, specialized neurons in
the hypothalamus of the brain sense the change. These neurons signal other nerve centers, which in
turn send signals to the blood vessels of the skin. As these blood vessels dilate, more blood flows
close to the body surface and excess heat radiates from the body. CAN SOMEONE PLEASE HELP
Answer:
1. Negative Feedback
2. Negative Feenback
3. Positive Feedback
what does it mean when it says "glycolysis had a netto effect of two ATP molecules"
The statement "glycolysis had a net effect of two ATP molecules" is due to the production of 4 ATP molecules and use of two ATPs during these reactions.
What is glycolysis?Glycolysis is the first step of cellular respiration, which is well know to produce two ATP molecules.
The complete process generates four ATP molecules but two ATPs are used during glycolysis reactions.
In conclusion, the statement "glycolysis had a net effect of two ATP molecules" is due to the production of 4 ATP molecules and use of two ATPs during these reactions.
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Question 9 of 38
Which of the following is a benefit of commercial agriculture?
A. The use of diesel farm machinery
B. Efficient milk production
O C. A reduction in biodiversity
OD. Water conservation
SUBMIT
Efficient milk production is a benefit of commercial agriculture. thus option B is correct.
What is commercial farming?Commercial farming is a practice where crops and livestock are cultivated with the intention of selling them as finished goods to gain money. A significant amount of capital investment is required to grow commercial farming.
When making commercial dairy, the milk is placed into MASSIVE industrial centrifuges, where it is divided into different components like lipids and proteins. To create whole, low-fat, and skim milk, the components are then once again mixed. It is pasteurized, put in a bottle, and transported.
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What is the best way to prevent the growth of bacteria on food preparation surfaces?
The best way to prevent the growth of bacteria on food preparation surfaces is sterilization. Details about sterilization can be found below.
What is sterilization?Sterilization is the process of treating something to kill or inactivate microorganisms.
Sterilization can also be done to prevent the reproduction of microbial population.
It is a known fact that microbes are responsible for food spoilage, hence, to prevent this, it is important to kill or get rid of them.
Therefore, the best way to prevent the growth of bacteria on food preparation surfaces is sterilization.
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Green building involves architecture that consists completely of organic materials.
Please select the best answer from the choices provided
what is vegetative propagation?? explain in detail
Plant development from vegetative components such as stems, roots, and leaves is known as vegetative propagation.
Plants, unlike most animals, may be propagated by extracting a portion of tissue (usually a leaf, stem, or root) from a parent plant and cultivating it in perfect conditions. Remove a little growing tip off an apple tree limb and plant it in moist soil in a warm, semi-humid region, for example. It will become a new plant when the branch grows roots.
Reasons for vegetative propagation:
Preserving characteristics Vegetatively propagated plants are clones of their parents. They share the exact same DNA. As a consequence, they will grow in the same pattern, blossom in the same color, taste the same, be disease resistant, and so on. In reality, if you enjoy an apple tree, the only method to increase its number is to reproduce it vegetatively*. Seedlings will be connected to their parents but will most likely have numerous different characteristics.Ease Rooting clippings from a parent plant is simple and inexpensive. Collecting seeds on contract might be time intensive.The downside:
Lack of diversity An orchard of clones, as one might expect, is far more sensitive to diseases and stress; if one plant becomes ill, they all get ill. When plants reproduce through seeds, their DNA is mixed, resulting in new variants. Genetic diversity ensures that at least one plant will survive and continue to reproduce.VEGETATIVE PROPAGATION -:
PROPAGATION IS THE MODE OF REPRODUCTION IN WHICH PRODUCTION OF NEW PLAN TAKE PLACE FROM THE VEGETATIVE PART OF ROOTS STEM LEAVES BULBILIS OF PLANT .
_____________________NATURAL METHODS -:
1 PROPAGATION BY ROOTS
plant like carrot sweet potato daheliya can grow into new plant from their root cutting root of these plant are swell in and have food stored in them there root cutting hai but which when placed in moist soil give rise to new plant.
_________________________________2 PROPAGATION BY LEAVES
plant like sugarcane money plant banana strawberry patted to its rapid is from their stem cutting potato and underground stem has small bird called eyes on it surface these on coming in contact with moist soil germinate give rise to new plant.
ginger and underground stem card reserve also reproduce in the same method underground stem of onion tulip called bulbs they have birds in their body which rise to new plant_____________________________
PROPAGATION BY LEAVES
the leaps love plant like begonia produce Bird on their margins on touching moist soil the birds grow into new plant .
__________________________________
PROPAGATION BY BULBILIS
bulbils are fleshy root on auxils
__________ARTIFICIAL PROPAGATION
1 STEM CUTTING
a small piece of this stem of a plant having at least one known is called stem cutting and stem cutting is placed in moist soil under suitable condition it developed new leaves complete plant
2 layering
laying the method of propagation stem of plant bent down sarpali into ground so that covered with soil after removing a ring of work from the stem
3 GRAFTING
new varieties of plant are developed by this method root portion call the stock is taken from one plant and portion that has many butcars ki and is taken from another plant the end of stock is can obliquely cut tired together
ADVANTAGESIT IS THE FASTEST METHOD OF INCREASING THE NUMBER OF PLANT PLANT MATURE AND BEAR FRUIT FASTER THE NEW PLANT ARE AN EXACT COPY OF PARENT PLANT SO IT DESIRED QUALITY OF PARENT PLANT CAN BE REPLICATED IN NEW PLANT.DISADVANTAGE
PLANT LOSS THERE VIBHOUR WITH TIME WAS THERE IS NO GENETIC VARIATION IT OF THE RESULT IN OVERCRODING IS SO MANY PLANT PRODUCEWhich is one quality of the entire open-ocean zone?
In the Galapagos Island finches, the variation in the beak shape correspond to which finch characteristic?
Answer:
Their diet
Explanation:
Over time, all of the finches adapted to their food source. This caused the evolution of their beaks to begin.
the ozone layer is a/an
A- layer of soil where oxygen is particularly abundant
B- atmospheric process like climate change
C- layer of the atmosphere, rich in ozone gas, that protects the Earth's inhabitants from the harmful effects of UV radiation
D- layer of gas at the bottom of the ocean that bubbles off when disturbed
Answer:
the answer is c
Explanation:
pretty simple
The ozone layer is best described as a layer of the atmosphere, rich in ozone gas, that protects the Earth's inhabitants from the harmful effects of UV radiation. The correct option is C.
The ozone layer is found in the stratosphere, a region of the Earth's atmosphere located approximately 10 to 50 kilometers above the Earth's surface.
It contains a higher concentration of ozone (O3) molecules compared to other parts of the atmosphere.
The ozone molecules in this layer absorb a significant portion of the incoming UV radiation from the Sun, thereby shielding living organisms on Earth from its harmful effects.
UV radiation can be harmful to human health and ecosystems.
Overexposure to UV radiation can cause sunburn, skin cancer, cataracts, and immune system suppression in humans.
Thus, the correct option is C.
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Name two places where carbon is stored.
Answer:
rocks and sediments
Explanation:
On Earth, most carbon is stored in rocks and sediments, while the rest is located in the ocean, atmosphere, and in living organisms.
what is the most widely used method of gene editing?
CRISPR/Cas9 is the most widely used genome editor.
Genome editing, also called gene editing, is an area of research seeking to modify genes of living organisms to improve our understanding of gene function and develop ways to use it to treat genetic or acquired diseases.
Describe how physical and chemical changes affect mass
Answer:
Explanation:
Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.