AnswersFall 24 GSE Biology B-ICEvolutionary Relationships

Evolutionary Relationships — Unit test Answers

1 verified answers
1
Free Preview

What will happen to the frequency of the recessive allele for the HbS gene when there is an outbreak of malaria?

A
The frequency will increase.
B
The frequency will decrease.
C
The frequency will remain constant.
D
It is impossible to predict how the allele frequency will change.
E
The frequency will be cut in half with each generation.
2
Free Preview

Darwin’s finches evolved on an island. What is the main reason that islands often provide good examples of evolution?

A
They have many niches.
B
They have many organisms that live on them.
C
They allow for automatic biogeographic isolation.
D
They allow for many variations to exist in species.
3

A student argues that two species of birds are the same species because they have similar body structures, similar DNA, and similar beaks. Another student argues that the birds are different species because they have different color patterns and have a different mating season. Which piece of evidence supports the second student's argument?

A
The birds have similar body structure.
B
The birds have similar beaks.
C
The birds have different color variations.
D
The birds have different mating seasons.
4

Consider the generalized cladogram of fish.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?

Question illustration
A
A
B
B
C
C
D
D
5

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

A
They are not related, but still have similar development.
B
They are distantly related, so their development is similar.
C
The embryos mutate in utero to form different structures.
D
The genetic makeup of the two species changes during development.
6

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

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

Which is an example of temporal isolation?

A
flowers that bloom in different months
B
birds that have different mating calls
C
fruit flies that mate in different locations
D
squirrels that have different fur colors
8

The fossil record shows that the average size of black bears was large during cold glacial periods and got smaller during warmer time periods. What is this an example of?

A
directional selection
B
disruptive selection
C
ecosystem selection
D
stabilizing selection
9

Which of these are most likely homologous structures? bat wing dragonfly wing Tyrannosaurus arm

Question illustration
A
bat wing and dragonfly wing
B
bat wing and Tyrannosaurus arm
C
dragonfly wing and Tyrannosaurus arm
D
bat wing, dragonfly wing, and Tyrannosaurus arm
10

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
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
Some traits appear in each generation, while others seem to disappear in some generations.
11

Carlos is collecting data about the length of earthworms in his backyard. The shortest worm he found is 4 inches long; the longest worm is 8 inches long. If most of the worms are either short or long, which type of distribution is displayed in the population?

A
directional
B
disruptive
C
stabilizing
D
normal
12

Populations of organisms that exhibit a high degree of variation have a greater chance for survival than populations of organisms that show little variation. This statement is

A
always true.
B
usually true.
C
rarely true.
D
never true.
13

A founding population of lizards arrives on an island. Which type of isolation would most likely result in this population becoming a new species?

A
temporal
B
geographical
C
anatomical
D
behavioral
14

Which factors affect natural selection?

A
inheritance, isolation, adaptation
B
variation, overpopulation, adaptation
C
isolation, overpopulation, speciation
D
variation, inheritance, speciation
15

In four o’clock plants, there are three phenotypes for flower color, but only two alleles. The table shows both the expected and observed numbers of plants of each flower color in a population of 1,000.PhenotypeNumber expectedNumber observedRed flowers105173Pink flowers484343White flowers411484Which statement best explains the results in the table?

A
The population is in equilibrium because the total number of plants expected and observed was about the same.
B
The population evolved because the frequency of the alleles and the genotypes changed.
C
The frequency of the alleles and genotypes in the population changed because of gene flow.
D
The observed frequency of the phenotypes is different from the expected frequency because some alleles mutated.

Did you find these answers helpful?

More from this Course

Quiz
22 verified answers

Unit Test

Quiz
18 verified answers

Unit Test

Quiz
15 verified answers

Unit Test