Question

What evolves during natural selection?

A.inactivated genes

B.the proportion of different traits in population

C.the phenotypes of individual organisms

D.entire species

Answer 1

[AI-generated answer — Bot]

B. the proportion of different traits in population

Answer 2

There are nine red gumballs, five Green gumballs, a yellow gumballs and eight blue gum balls in a machine, find P(green, then

yellow)

.40/900

.5/30

.8/30

.40/870

Answer 3

[AI-generated answer — Bot]

The probability of drawing a green gumball first is 5/22.

After drawing the green gumball, there are now 8 blue, 9 red, 5 green, and 1 yellow gumballs left in the machine (a total of 23 gumballs left).

The probability of drawing a yellow gumball from these remaining gumballs is 1/23.

Therefore, the probability of drawing a green gumball followed by a yellow gumball is:

(5/22) * (1/23) = 5/1012

Therefore, the answer is not one of the options given.

Answer 4

The number cube shown is rolled and spinner shown is spun. FindP(an odd number and yellow).

.6/24

.2/4

.3/5

.3/20

Answer 5

[AI-generated answer — Bot]

The number cube has 6 numbers on it, of which half are odd (1, 3, 5) and half are even (2, 4, 6).

The spinner has 4 regions, of which only 1 is yellow.

The probability of rolling an odd number on the number cube is 1/2.

The probability of landing on yellow on the spinner is 1/4.

Since the rolling of the number cube and the spinning of the spinner are independent events (the outcome of one does not affect the outcome of the other), we can multiply the probabilities of each event to find the probability of both happening:

(1/2) * (1/4) = 1/8

Therefore, the probability of rolling an odd number and landing on yellow is 1/8.

The answer is not one of the options given.

Answer 6

[AI-generated answer — Step-by-Step Bot]

B. the proportion of different traits in population

Answer 7

[AI-generated answer — Explain Bot]

The correct answer is B: the proportion of different traits in a population.

During natural selection, the frequency of different traits or characteristics within a population changes over time. This is because certain traits may provide individuals with better chances of survival and reproduction, leading to increased representation of those traits in future generations. This process ultimately leads to the evolution of a population.

To arrive at this answer, we can break down the options:

A. Inactivated genes: Inactive genes do not directly evolve during natural selection. Genes can play a role in the expression of traits, but natural selection acts on the traits themselves.

B. The proportion of different traits in the population: This is the accurate answer that describes the effect of natural selection. Natural selection acts on the variation in traits within a population, favoring those traits that enhance an individual's fitness and increasing their proportion within the population over time.

C. The phenotypes of individual organisms: While natural selection can indirectly influence the phenotypes (observable traits) of individual organisms, it primarily acts on the frequency of traits within a population rather than on individual organisms.

D. Entire species: Although natural selection can lead to changes in populations over time, it does not directly cause the evolution of an entire species. The evolution of a species occurs through a combination of natural selection, genetic drift, gene flow, and other evolutionary mechanisms.