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Paul [167]
3 years ago
10

Natural selection is based on the idea that as an environment changes, an individual's genetic makeup will change suddenly to su

it the new environment.
Biology
1 answer:
Schach [20]3 years ago
7 0
No. The natural selection is when the best suit fits survive. Therefore is not the idea that as an environment changes.
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What is embedded in the phospholipid bilayer that helps in the movement of larger molecules ?
gladu [14]

Answer:

\boxed {\boxed {\sf A. \ Channel/Transport \  proteins}}

Explanation:

The phospholipid bilayer is also known as the cell membrane. It covers cells and regulates the transport of substances. Certain ones can pass and others cannot, depending on certain factors like size and polarity.

Smaller substances tend to diffuse or move across the membrane quite easily. However, larger molecules have a much harder time. Many depend on special proteins embedded in the membrane. These are called transport proteins and they form a channel so large molecules can still move in or out of the cell.

So, salt, water, and fats do not contribute to the movement of larger molecules, but <u>channel or transport proteins do and choice A is correct. </u>

3 0
2 years ago
Determine whether the statement is true or false. Suppose P(t) represents the population of bacteria at time t and suppose P'(t)
Lorico [155]

Answer:

TRUE

Explanation:

If the population follows a logistic growth curve, the graph of P vs t will look like the diagram below.

The rate of growth (P') increases slowly at first, then increases rapidly from 2 to 4, and then slows down, but always P > 0.

The graph has an inflection point at (3, 1000). That's the point at which the rate of growth starts slowing down.

When t < 3, P'' > 0.  

When t = 3, P'' = 0.

When t > 3, P'' < 0, because the rate of population growth is slowing down.

Thus, if the population is in the final phase of logistic growth, the population is increasing at a decreasing rate (TRUE)..

4 0
3 years ago
If an ecosystem has only enough food for 100 people and 20 horses, when the population increases to 200 people, 30 horses, and t
Tamiku [17]
The answer is D. Food Threshold is the amount of food capable on feeding the organisms.
4 0
3 years ago
What does it mean to say that cells are "specialized"?
Ratling [72]

Answer:

i think the answer is B

Explanation:

Specialized means they preform a specific task.

7 0
3 years ago
In a large population of plants, notches in the leaves are caused by a dominant allele N and lack of notches by a recessive alle
Jobisdone [24]

Answer:

C

Explanation:

If the population is in equilibrium, the allele frequencies will be constant.

There is nothing about the heritability of dominant or recessive alleles that make dominant ones any more likely by nature. This rules out choices A and B.

Genetic drift mentioned in D refers to alleles leaving a population. Nothing like this was mentioned in the question, so count that answer out.

C is the only remaining answer by process of elimination. It is also the most logical choice. Directional selection refers to a process of natural selection wherein extreme phenotypes (notched leaves, or non-notched leaves) are favored. In this case, there may be some external pressure causing notched leaf plants to be more evolutionarily fit, meaning that they survive long enough to reproduce more and increase allele frequency of the dominant allele.

5 0
3 years ago
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