Answer:
Natural selection can cause microevolution (change in allele frequencies).
Explanation:
With fitness-increasing alleles becoming more common in the population.
Fitness can affect the survival and reproduction rates of individuals with different alleles, leading to differential contribution to the next generation and changes in the frequency of these alleles in the population.
What is fitness?Fitness is a measure of the reproductive success of an individual within a population. The fittest individuals are those that are most successful at passing their genes on to the next generation. When the environment changes, the selective pressures on a population also change. This can lead to changes in the relative fitness of different individuals, and thus changes in the allele frequencies of a population over time.
For example, if a population of birds lives on an island with small seeds, those birds with small beaks may be more fit than those with larger beaks. This is because they are better adapted to the environment and can more easily obtain food. Over time, the frequency of the small-beaked allele will increase in the population, while the frequency of the large-beaked allele will decrease.
Thus, fitness can drive changes in the allele frequency of a population over time by favoring those individuals with alleles that are better adapted to the environment.
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Which statement about the nucleus of a cell is NOT true?
a. The nucleus contains a nuclear membrane.
b. All of the cell membrane is found in the nucleus.
C. The nucleolus is contained in the nucleus.
d. Genetic material is found in the nucleus
Answer:B
Explanation:The rest of them are correct.
Answer:
its B
Explanation:
where are the motor proteins that move chromosomes toward the poles of the mitotic spindle located?
Answer:
They are at or near the ends of the microtubules. I hope this helps you! :D
Microtubules near the cell plate are the motor proteins that move chromosomes toward the poles of the mitotic spindle located.
What are motor protein?Motor protein are defined as a group of molecules with the ability to travel across the cytoplasm of animal cells. Molecular motors called motor proteins move along the cytoskeletal filaments of the cell by hydrolyzing ATP. They provide a variety of tasks for biological systems, such as facilitating intracellular trafficking along biopolymer filament tracks and regulating filament sliding during muscle contraction.
Microtubules are defined as the cytoskeleton is made up of tubular-structured polymers, which are present throughout the cytoplasm. Microtubules play a variety of roles in dividing cells, including the construction of the mitotic spindle and axon extension in neurons.
Thus, microtubules near the cell plate are the motor proteins that move chromosomes toward the poles of the mitotic spindle located.
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The skeletal system stores minerals and maintains mineral
a purity
b structure
C homeostasis
D surfaces
Answer:
C homeostasis
Explanation:
What happens to the population of lynx as the number of snowshoe hares decreases?
What phases are A, B, C D, and E? I’ll mark brainliest if you’re right!
Answer:
A: Anaphase
B: Anaphase II
C: Prophase I
D: Metaphase I
E: Metaphase II
Explanation:
Describe the main structures involved in photosynthesis.
Answer:
In plants, photosynthesis takes place in chloroplasts, which contain the chlorophyll. Chloroplasts are surrounded by a double membrane and contain a third inner membrane, called the thylakoid membrane, that forms long folds within the organelle.
Explanation:
we used a formal method of study to figure out which kind of grocery bag had the least effect on the environment. what is the student describing
A. using the scientific method
B. making a conclusion
C. using scientific tools
D. making random discoveries
Answer:
a
Explanation:
members of phylum rotifera are single-celled organisms.
Answer:
False
Explanation:
hope i helped
how many tons of soil is eroded each year in the united states
A. 20.5 million
B. 95.6 Million
C. 1.6 Billion
D. 22 Billion
Answer:
I think D Is the answer
Explanation:
I am not sure though
Please heeelp. :(
I don't understand anything about this topic, its urgently.
De donde proviene el oxigeno que se libera durante la fotosintesis
Answer:
Sorry i dont know
Explanation:
Construct the correct sequence of events for meiosis I, starting at the top.
1. Separated homologues cluster at each pole.
2. Paired homologues align at the equator, microtubules attach to kinetochores of sister chromatids.
3. Microtubules shorten, chiasmata are broken, homologous chromosomes are pulled to opposite poles.
4. Nuclear envelope re-forms around each daughter nucleus.
5. Chromosomes condense, forming of spindle apparatus begins, homologous chromosomes pair and crossing over occurs.
The sequence of events in meiosis I is first 'chromosomes condense and crossing over occurs', second 'paired homologues align at the equator', third 'chromosomes are pulled to opposite poles', fourth 'separated homologues cluster at each pole' and fifth 'nuclear envelope re-forms around each daughter nucleus'.
Meiosis is a reductional cell division by which a parent cell produces four daughter cells with half of the genetic material.
Meiosis can be divided into meiosis I and meiosis II.
During prophase I (meiosis I),
Chromosomes condenseBegins the formation of the spindle apparatus from cytoskeleton present in the cytoplasmThe homo-logous chromosomes pair and crossing over occurs. Crossing over refers to the interchange of genetic material between non-sister chromatids.During metaphase I,
The homo-logous chromosomes align at the equator plate of the cellThe microtubules attach to the kinetochores of sister chromatidsDuring anaphase I,
The microtubules shortenThe chiasmata, which link homo-logous chromosomes together until anaphase I, are brokenThe homo-logous chromosomes are pulled to opposite poles, thereby, one chromosome of each pair randomly moves to one pole of the cell and the homologous chromosome to the other.During telophase I,
The separated homologous chromosomes cluster at each pole of the new cellsThe nuclear envelope is formed around each cell nucleus.Learn more in:
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a bacterium has positively supercoiled dna. this is likely because
Answer:
A bacterium has positively supercoiled DNA. This is likely because? A. The bacteria don't normally express their genes. B.
Explanation:
The bacteria normally grow in high temperature condition. So, the correct option is D.
What is Bacteria?Bacteria are defined as tiny, single-celled organisms that are millions of different types of bacteria. Many can be found in and on the body and are beneficial to us. Bacteria lack a membrane-bound nucleus and other internal structures, so they are classified as unicellular life-forms called prokaryotes.
The bacteria in our bodies help break down the food we eat, provide us with nutrients and neutralize toxins that play an essential role in preventing infection by protecting colonized surfaces from invading pathogens.
Thus, the bacteria normally grow in high temperature condition. So, the correct option is D.
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Your question is incomplete, most probably the complete question is:
A bacterium has positively supercoiled DNA. This is likely because
A. It doesn't matter if the supercoiling is positive or negative as long as it compresses the DNA
B. The bacteria need most of their genes to be active
C. The bacteria don't normally express their genes
D. The bacteria normally grow in high temperature condition
What is the major role of leaves
Answer:
please give me brainlist and follow
Explanation:
The main function of a leaf is to produce food for the plant by photosynthesis. ... Oxygen is passed into the atmosphere through stomata—pores in the leaf surface. photosynthesis. Green plants such as trees use carbon dioxide, sunlight, and water to create sugars.
Which cell part is common to plant cells and animal cells?
centrioles
cell wall
chloroplast
mitochondrion
Answer: centrioles
Explanation:
the acromial end of the clavicle articulates with the
Answer:
acromion of the scapula
The acromial end of the clavicle articulates with the acromion of the scapula at the acromioclavicular joint. This end is also anchored to the coracoid process of the scapula by the coracoclavicular ligament, which provides indirect support for the acromioclavicular joint.
Explanation:
What is the main difference between mitosis and cytokinesis?
Answer:
Mitosis refers to a cell centre division into two, whereas cytokinesis refers to the further breakdown of the cell cytoplasm that forms two girl cells.
Specific cell organelles and cytoplasms are cytokinesis, whereas mitosis is only inherited through heritage.
Organelle division is not essentially equal during cytokinesis.
Explanation:
hope this helps you if it does please mark brainest
which description of a muscle action is not correct?
Answer:
saying that muscle action is not correct is incorrect
Explanation:
science
After the enzyme releases a molecule of carbonic acid, what MOST LIKELY will occur next?
Answer:
After the enzyme releases a molecule of carbonic acid what most likely will occur next? the Enzyme will repeat its function of binding reactants and releasing carbonic acid. Carbonic anhydrase is found in the bloodstream of the human body
When solutes move AGAINST their concentration gradient (move from LOW concentrations to HIGH concentrations), it must use _______________________ to power its movement.
Fill in the blanks:
transcription
translation
DNA
Match the DNA bases with its
complementary mRNA base:
in DNA: in mRNA:
A
T
С
G
EU
Construct a complementary mRNA strand
of the following strand of DNA:
AGC TCA CTG
Answer:
A - T
T - A
C - G
G - C
TCG AGT GAC
Most metabolic and regulatory functions in a neuron happen where?
Most metabolic and regulatory functions in a neuron happen in the cell body or soma.
Where do most metabolic and regulatory functions occur in a neuron?In a neuron, the cell body or soma is where the majority of metabolic and regulatory functions take place. The cell body contains the nucleus, which houses the genetic material necessary for protein synthesis and other cellular processes.
It also contains various organelles such as mitochondria, responsible for energy production and metabolism. Additionally, the cell body is involved in regulating the neuron's overall function including maintaining its structural integrity and coordinating signals received from dendrites and transmitted through the axon.
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How is coal and petroleum formed
Answer:
Coal and petroleum are formed as a result of degradation of ancient plant life which lived millions of years ago. These dead plant matter started to pile up, eventually forming a substance called peat. Over time, heat and pressure from geological processes transformed these materials into coal.
Explanation:
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Which statement is correct for triglycerides and phospholipids?
A A phosphate group is joined to a glycerol molecule.
B Hydrocarbon chains may be saturated or unsaturated.
C They are polar molecules.
D They contain three ester bonds.
Your answer
Answer:
done
Explanation:
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All living things are made of cells, but not all cells are the same. While a specific cellglossary term (opens in a new window)’s structureglossary term (opens in a new window) depends on the type of cell, some structures are common to all eukaryoticglossary term (opens in a new window) cells. For example, all eukaryotic cells have a nucleus, membrane-bound organelles, a plasma membrane, and cytoplasmglossary term (opens in a new window). The nucleus of a cell surrounds the genetic material with a membrane. Other structures called organelles are also surrounded by membranes. The membranes around the organelles both protect and isolate, helping the organelles work more efficiently. Organelles perform various vital tasks, and each organelleglossary term (opens in a new window) has a specific structure related to its function. Organelles provide the cell with energy, excrete waste products, and make proteins. All eukaryotic cells also have a plasma membrane that envelopes the entire cell. The membrane has many passages through it. These passages chemically control what can enter or leave the cell. All eukaryotic cells also have cytoplasm. This jelly-like fluid fills the cell’s interior and contains thread-like proteins that help the cell keep its shape.
SUMMERIZED PLEASE ILL give brianly est
Answer:
The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. The cell is the fundamental unit of structure and function in living things. All organisms are made up of one or more cells. The cell is the basic unit of structure and organization in organisms. Cells arise from pre-existing cells. A cell is the smallest unit that is typically considered alive and is a fundamental unit of life. All living organisms are composed of cells, from just one unicellular to many trillions multicellular. I hope i helped you
Explanation:
Paired funnel shaped organs used for excretion in annelids
Answer:
Nephrdia(metanephridium)
How can humans influence the nitrogen cycle?
A. By taking really long showers
B. By using too many fertilizers
C. By driving cars that release lots of carbon dioxide
Explanation:
I think the answer is B hopefully it's right
A comparative line graph has only one line.
A. True
or
B. False
Answer:
you refer to attached please mark me brainlist iam change my country iam coming from India
The weather forecaster predicts a high temperature today of 86 °F. What will the temperature be in Celsius?
SELECT AN ANSWER
A- 97.2 ˚C
B- 359 ˚C
C- 30 ˚C
D- 65.6 ˚C
how can several classification categories be used on the same object????????
Answer: Several classification categories can be used on the same object by characteristics that have been given.
Explanation:
Kingdom:
The highest category into which organisms are classified.
Phylum:
A category used in the classification that consists of one or several similar or
closely related classes. You may also use DIVISION.
Class:
One or several similar or closely related orders. Similar classes are grouped
into PHYLUM.
Order:
One or several similar or closely related families. Similar orders form a
CLASS.
Family:
One or several similar or closely related genera. Similar families are grouped
into an ORDER. The names are usually determined from a type genus (Cactus,
Equus) that is characteristic of the whole family.
Genus (pl. genera):
A number of similar or closely related species. The common name of an organism
is sometimes identical to the genus, e.g. Lilium = lily. Similar genera are
grouped into a FAMILY.
Species:
A group of similar individuals that can breed and produce fertile offspring.
Similar and related species are grouped into a GENUS. Within certain groups,
species may not mate and will under different selection pressures develop
different characteristics form the main population. This is called a
subspecies.
Hope this helps!!!
By characteristics, multiple classification categories can be applied to the same object.
How the classification is done ?
The specificity of the categories within a taxonomic classification increases.Domain, the point of origin for all species, is the most general category in taxonomic classification; One of these domains is shared by all species: Eukarya, bacteria, and archaeaKingdoms are the second taxonomic classification category within each of the three domains, followed by phylum, class, order, family, genus, and species categories.Because they are more closely related, organisms become more similar at each classification category.As inaccuracies in classifications are discovered and rectified, changes to the taxonomic classification of many species must be made as scientific technology advances.A hierarchical model is used in the taxonomic classification system, which is also known as the Linnaean system after its creator, Swedish botanist, zoologist, and physician Carl Linnaeus.The groups get more specific as they move away from the point of origin, until one branch becomes a single species.For instance, scientists divide organisms into three large domains following the common beginning of all life: Eukarya, bacteria, and archaea.A kingdom is a second category that exists within each domain.The following categories of increasing specificity follow kingdoms: family, genus, class, order, phylum, and species.Plants and animals are two types of living things.Plants can be further divided into flowering and non-flowering varieties or grouped according to other characteristics.Insects, reptiles, fishes, mammals, and others are subcategories of animals.To know more about classification check this :
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