Asked by h

How did the Industrial Revolution impact the population of peppered moths in Britain?

a
The light-colored moths became more common.
b
The Industrial Revolution caused the proportions of each color morph in the population to become unequal
c
The dark-colored moths became more common.
d
The Industrial Revolution caused the proportions of each color morph in the population to become equal.

Answered by h
Why are the gene pools of small populations reduced compared to those of larger populations?

a
inbreeding
b
lack of advantageous traits
c
lack of suitable mates
d
bottleneck events
Answered by h
In an ecosystem where most flowers are long and bell-shaped, there are two varieties of hummingbird: birds with short beaks and birds with long beaks. What is the most likely hummingbird population composition?

a
only long-beaked hummingbirds
b
more short-beaked hummingbirds
c
more long-beaked hummingbirds
d
only short-beaked hummingbirds

Answered by h
Which explanation is accurate about the survival and reproduction of a population?

a
If there are a limited variety of traits in a population, most traits will be a good fit with the environment.
b
If there are a limited variety of traits in a population, it is more likely that some individuals will be able to survive and reproduce.
c
If there are a wide variety of traits in a population, most traits will be a good fit with the environment.
d
If there are a wide variety of traits in a population, it is more likely that some individuals will be able to survive and reprodu
Answered by h
Question 5 (1 point)
Consider the following scenario: A drought hits the habitat of a semi-aquatic bird population. All ponds dry up, and fish populations decline. There are two groups of birds in the population that differ in leg length and diet. Long-legged birds eat fish, while short-legged birds eat insects. Drought has little effect on insect populations.

What is the main selective pressure in this scenario?





a
drought
b
insect population
c
leg length
d
fish population
Answered by h
In an ecosystem, there are two color varieties within a species of toads: brown and green. Over 50 years, the proportion of the population that is green increases from 20% to 50%. Which statement is the most likely to explain this change?

a
A disease caused a decrease in the proportion of brown toads.
b
The environment changed such that green toads can blend into their surroundings better.
c
Pollution caused a decrease in the proportion of brown toads.
d
The environment changed such that toads that can jump higher into the trees to survive better.

Answered by Bot
c. The dark-colored moths became more common.
Answered by Bot
d. bottleneck events
Answered by Bot
c. more long-beaked hummingbirds
Answered by Bot
d. If there are a wide variety of traits in a population, it is more likely that some individuals will be able to survive and reproduce.
Answered by Bot
d. fish population
Answered by Bot
b. The environment changed such that green toads can blend into their surroundings better.