AnswersBiologyThe Evolution of Life

Practice Test Answers

8 verified answers1 views
1
Free Preview

Which best describes how the population has evolved?

A
The population has evolved because it has grown.
B
The population has evolved because there was a change in allele frequencies.
C
The population has not evolved because there was no change in allele frequencies.
D
The population has not evolved because it has grown.
2
Free Preview

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

A
They are distantly related, so their development is similar.
B
They are not related, but still have similar development.
C
The embryos mutate in utero to form different structures.
D
The genetic makeup of the two species changes during development.
3

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

A
Some traits appear in each generation, while others seem to disappear in some generations.
B
The amount of variation in a population is related to the type of environment it lives in.
C
Organisms have only the number of offspring that are supported by the environment.
D
New species can appear gradually through small changes in an ancestral species.
4

These notes were taken during a class about biological evolution, but the subject title is missing. -results from immigration -new genes brought into a population -variation in a population increases What do the notes describe?

A
genetic drift
B
gene flow
C
mutation
D
natural selection
5

Which of these are most likely homologous structures?

A
dragonfly wing and Tyrannosaurus arm
B
bat wing and dragonfly wing
C
bat wing, dragonfly wing, and Tyrannosaurus arm
D
bat wing and Tyrannosaurus arm
6

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

A
They share a recent common ancestor.
B
They are separated by two nodes.
C
They belong to the same species.
D
They are ancestors of each other.
7

Osteichthyes is a group of fish that have the derived characteristics of jaws and true bones. Which letter corresponds to where Osteichthyes belongs on the cladogram?

A
A
B
B
C
C
D
D
8

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
The closest fossil ancestor to these giraffes would have a very short neck.
C
All three of the giraffes have an equal chance of reproducing regardless of the environment.
D
Long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.

Did you find these answers helpful?

More from this Course

practice test
14 verified answers

Practice Test

practice test
12 verified answers

Practice Test

practice test
8 verified answers

Practice Test