Answers26-27 - C - RUSD Biology in the Living EarthEvidence of Evolution: Darwin's Theory

Practice Test Answers

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Suppose that species A and species B have the same body size. Knowing this information, what can be determined from the pictures?

A
Species A is able to rationalize thoughts more effectively than species B.
B
Species B can process sensory information more quickly than species A.
C
Species A's brain is smaller for its body size than the brain of species B.
D
Species B is more intelligent and has a better memory than species A.
4

Which is an example of temporal isolation?

A
squirrels that have different fur colors
B
birds that have different mating calls
C
flowers that bloom in different months
D
fruit flies that mate in different locations
6

Which factors affect natural selection?

A
variation, overpopulation, adaptation
B
isolation, overpopulation, speciation
C
inheritance, isolation, adaptation
D
variation, inheritance, speciation
7

What hypothesis did Darwin investigate by studying the breeding of pigeons with distinctive traits?

A
New species can appear gradually through small changes in an ancestral species.
B
Some traits appear in each generation, while others seem to disappear in some generations.
C
The amount of variation in a population is related to the type of environment it lives in.
D
Organisms have only the number of offspring that are supported by the environment.
8

Why do a chicken embryo and a cow embryo look very similar even though the adults do not?

A
The genetic makeup of the two species changes during development.
B
They are not related, but still have similar development.
C
The embryos mutate in utero to form different structures.
D
They are distantly related, so their development is similar.
9

Which best describes how the population has evolved?

A
The population has evolved because there was a change in allele frequencies.
B
The population has not evolved because it has grown.
C
The population has evolved because it has grown.
D
The population has not evolved because there was no change in allele frequencies.
10

Which of these are most likely homologous structures?

A
bat wing, dragonfly wing, and Tyrannosaurus arm
B
bat wing and Tyrannosaurus arm
C
bat wing and dragonfly wing
D
dragonfly wing and Tyrannosaurus arm
11

Which statement about the giraffes explains their evolution based on Charles Darwin’s main points?

A
As a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment.
B
All three of the giraffes have an equal chance of reproducing regardless of the environment.
C
Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.
D
The closest fossil ancestor to these giraffes would have a very short neck.
12

Which is the best description of the two organisms highlighted in orange?

A
They share a recent common ancestor.
B
They are ancestors of each other.
C
They belong to the same species.
D
They are separated by two nodes.
14

From the information in the graph, what can be predicted about this species?

A
The species is closely related to modern humans.
B
The species was smarter than modern humans.
C
The species lived between 1 point 5 and 1 million years ago.
D
The species lived between 1 and 0 point 5 million years ago.

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