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

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

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

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.