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Sidana [21]
2 years ago
6

Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrea

se in
Biology
1 answer:
zmey [24]2 years ago
8 0

Environmental factors can influence natural selection because they can increase or decrease and what can they increase or decrease in <u>the amount of </u><u>genetic </u><u>variation in a </u><u>population</u><u>.</u>

<u />

<h3>What is natural selection?</h3>

Populations of living things adapt and change through a process called natural selection. A population's members are naturally varied, which means that they are all distinctive in some ways. Because of this variety, some people have characteristics that suit their surroundings more than others.

Four requirements must be met for natural selection to take place: reproduction, inheritance, variety in physical traits, and variation in the number of children produced by each person.

Reproduction:

A population must procreate to produce a new generation in order for natural selection to affect it. Over many generations, people who have the characteristics that are most compatible with their environment tend to breed more than people who don't.

Heredity:

Since the genes of the parents combine to form the DNA of their offspring, heredity and reproduction go hand in hand. Natural selection must operate if parents with favourable qualities pass those traits on to their kids.

Variation in Characteristics:

Only when individuals within a community differ in their personal features can natural selection take place. For instance, different people must have varied colors in order to research natural selection on color within a population. There wouldn't be any traits for nature to "select" over others in the absence of variety in traits.

Fitness Variation:

Compared to its popular notion, fitness has a more technical meaning. Fitness in the context of evolution refers to an organism's capacity for maximum survival and reproduction. Natural selection cannot take place in a population unless its individuals have varying levels of fitness. Some people must have characteristics that make it easier for them to survive and procreate more frequently than others. Otherwise, natural selection cannot act to increase the number of people with advantageous features and decrease the number of people with undesirable qualities.

For more information regarding natural selection, visit:

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Another word for cytosol  is cytoplasm.
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3 years ago
The preferential use of phosphatidylinositol and phosphatidylethanolamine in the cytoplasmic leaflet of membranes leads to incre
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The best answer to the question: The preferential use of phosphatidylinositol and phosphatidylethanolamine in the cytoplasmic leaflet of membranes leads to increased:___ would be, D: All of the answers are correct.

Explanation:

There is still a lot of debate among scientists as to the exact way in which phospholipids are distributed between the two leaflets of a cell´s plasma membrane, but what they do know is that there are four kinds, and that phosphatidylinositol (a sterol) and phosphatidylethanolamine appear most commonly on the cytosolic, or cytoplasmic side of the membrane. They also believe that it is this particular arrangement which allows the cytoplasmic side of the membrane to be slightly negatively charged and this role will play a major part in a membrane´s ability to generate an action potential. Also, it is known that these negatively charged ends of the bilayer will allow certain proteins, positively charged ones, to be inserted, and connected to it, to become transporters, or mediators in action potentials and normal activities of cells. Finally, since fatty acids and cholesterol are associated with phospholipids, but have a tendency to be attracted to these particular two types, they tend to give the overall structure fluidity, but also permit  the inner leaflet to assume its particular circular shape around the cytoplasm. This is why the answer is D.    

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3 years ago
7. In the pocket mice investigation, what patterns in the data did you observe? Does the pattern in the
Korvikt [17]

Dark fur color appears to be an adaptation for mice living in dark environments, as both the frequency of the characteristic and the allele that generates it have altered. These findings further back with the theory that selection is context-dependent, as dark mice were preferred in some contexts but not in others.

<h3>What is mutation?</h3>

A mutation is defined as a change in the sequence of genetic letters, called bases, within a molecule of DNA.

In a population, more offspring are born than can survive, resulting in competition among people. Individuals that possess a certain trait are more likely to live and/or produce more offspring than those who do not possess that trait. The context in which a species exists influences its selection. Characteristics that are advantageous in one setting may be detrimental in another.

New mutations cause black color.

  1. Fur color is controlled by many genes (4:29).
  2. Most genes are identical, but dark and light rock
  3. pocket mice differ in one gene (Mc1r; 4:55).

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1 year ago
A scientist discovers at the end of an experiment that his hypothesis was
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C. Yes, the results of his experiment were probably inaccurate the

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2 years ago
The complex of dna and protein that makes up a eukaryotic chromosome is properly called __________.
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The complex of DNA and protein that makes up a eukaryotic chromosome is properly called <u>chromatin .</u>

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  • Chromatin is a complex of DNA and proteins that forms chromosomes within the nucleus of eukaryotic cells.

What is the chromatin and its function?

  • To create chromosomes, chromatin fibers are coiling and condensing.
  • Numerous cellular functions, including DNA replication, transcription, DNA repair, genetic recombination, and cell division, are made possible by chromatin.

What is chromatin in cell?

  • Chromosomes in eukaryotic cells are made of chromatin, a compound of DNA and proteins.
  • Nuclear DNA is extremely compressed and wrapped around nuclear proteins in order to fit inside the nucleus; it does not exist as free linear strands.

Where is chromatin found?

  • Chromatin is a genetic material or a macromolecule comprising DNA, RNA, and associated proteins, which constitute chromosomes in the nucleus of a eukaryotic cell.
  • This chromatin is located within the cell nucleus.

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5 0
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