Question

Over time staph bacteria have become resistant to the antibiotic penicillin. Which process explains how penicillin resistance developed?
A.cooperation
B.natural selection
C.extinction of a species
D.speciation

Which is not an example of a behavioral adaptation in plants?
A.sunflowers turning toward light
B.tree roots growing downward because of gravity
C.vines curling around a fence
D.thorns growing on rose stems

How can natural selection affect a predator-prey relationship in an ecosystem?
Choose all answers that are correct.
( ) Nature selects for traits that allow for them to survive and reproduce at a greater rate than those without these traits.
( ) Natural selection only acts on select generations of predator and prey populations.
( ) Over time populations stay the same even when another population changes.
( ) Natural selection can act on both the predator and prey populations.

Which is an example of a behavioral adaptation for a mouse?
A. A mouse has sharp teeth that allow it to gnaw through barriers.
B. A mouse lies still when it sees a cat, which helps it evade detection by a predator.
C. A mouse has brown fur that allows it to blend into its surroundings and evade predators.
D. A mouse has a keen sense of smell that allows it to find food.

What is a positive effect that predators have on a prey population?
A. Predators maintain an unchanged prey population to increase the use of food, water, and shelter.
B. They keep the prey population low so they will be less likely to deplete resources such as food, water, and shelter.
C. They eliminate the prey population in order to maintain competition over resources such as food and water.
D. Prey are able to increase their populations and use of food, shelter, and water when predators are on the hunt.

Answer 1

Hi'
I think it will be natural selection

Answer 2

Hello @chinitafifi01 !

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Answer 3

Answer to the second question is D as it is a structural adaptation

Answer 4

For Q3
C,D

Answer 5

For Q4
B

Answer 6

For last one i think it should be A

Answer 7

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Answer 8

Abhisar thank you for your help. I really appreciate your support :)

Answer 9

\(\Huge\text{Anytime !}\)
\(\huge\ddot\smile\)