Worksheets5.4.23 - Topic 7 - Evolution - Keystone Review
Total questions: 20
Worksheet time: 13mins
Two closely related shrimp species have habitats and niches that partially overlap. Which factor most likely caused the divergence of the shrimp into separate species?
reproductive isolation
reduction of food supply
a series of rapid mutations
large initial population size
The diagram shows the forelimbs of three animals. Which statement best describes the bones in the animals?
All organisms on Earth have the same bones.
Different bones in similar species serve the same function.
The species that are the most evolved have the longest bones.
Similar bones in different organisms may have different functions.
Which statement best describes how geographic isolation can contribute to land animal speciation?
Geographic isolation physically separates populations but allows them to interact.
Geographic isolation physically separates populations and prevents them from interacting.
Geographic isolation causes genetic changes in individual organisms but allows them to interact.
Geographic isolation causes genetic changes in individual organisms and prevents them
from interacting.
Whales have vestigial femurs and pelvic bones. Which statement explains why the vestigial structures are most likely present in whales?
Whales evolved over time from ancestors that lived on land.
Whales evolved over time from fish species that once lived on land.
Hind legs are an adaptation in whales that is selected for as they evolve into land mammals.
Hind legs are an evolutionary adaptation observed in whales that walk along the ocean
floor.
Four pieces of evidence collected by scientists are listed. How did the scientists most likely use these pieces of evidence?
to support the cell theory
to support the theory of evolution
to explain the process of DNA replication
to explain the process of genetic mutations
Which statement best describes how scientists use the Yawunik fossil evidence to support its evolutionary relationship to other arthropods?
They interpret the similar anatomy of other arthropods.
They identify the DNA of several other similar arthropods.
They locate other arthropod fossils in the Burgess Shale area.
They compare embryological development to other arthropods.
The frequency of an allele in a fl y population changes from 89% to 20% after three generations. Which other events most likely occurred during the same time period?
an environmental change and a fly population increase
an environmental change and a fly population decrease
interbreeding of flies with an invasive species and fly population speciation
interbreeding of flies with an established local species and fly population speciation
The graph shows the frequency of two traits, 1 and 2, in a population.
Part A: Use information from the circle graph to infer which trait is most likely favored by natural selection.
Part B: Explain how natural selection could lead to the trait distribution shown in the circle graph.
Part C: Scientists predict that over time 0% of the population will have trait 2. Explain why this change in trait distribution could result in negative consequences for the population.
Tail length in mice varies within a population. Scientists observed change in the distribution of tail lengths in a mouse population over time. At the genetic level, what has most likely happened to the allele for the shortest tail lengths?
The allele changed from being dominant to being recessive.
The allele changed from being autosomal to being sex-linked.
The allele became less frequent than the alleles for longer tail lengths.
The allele began to code for long tail lengths instead of the shortest ones.
Overuse of antibiotics has caused antibiotic resistance in some bacteria in a population. Which statement describes the most likely impact of natural selection on the bacterial population?
Beneficial mutations have decreased, resulting in a larger population than normal.
Only the genes for antibiotic resistance are now expressed, eliminating other genes.
More antibiotic-resistant bacteria have survived, resulting in more offspring with this trait.
The bacteria have become genetically isolated, resulting in decreased reproductive rates.
Which statement is a hypothesis?
The presence of an enzyme increased the reaction rate.
The reaction rate increased 100% once the enzyme was introduced.
Introducing an enzyme into a reaction did not increase the rate of the reaction.
When an enzyme is introduced into a reaction the reaction rate will increase by 100%.
A population of squirrels was separated during the formation of the Grand Canyon. Over time the squirrels, separated by the canyon walls and the Colorado River, became unique species. Which mechanism most likely caused the development of the new species?
habitat preference
increased gene flow
geographic isolation
behavioral isolation
A researcher observes two species of frogs in the same area. Both species have a similar diet. One species breeds in fast-moving streams, while the other species breeds in ponds. Both species are similar in appearance and have very similar DNA. Which information provides the best evidence that these two species descended from a common ancestor?
the species’ similar diets
the species’ shared habitat
the species’ mating behaviors
the species’ physical characteristics
Statement 1: All living things are composed of cells.
Statement 2: If soil contains high levels of salt, the plants will die.
Statement 3: The temperature reading on the thermometer is 21°C.
Statement 4: It must have rained this morning because the soil is wet.
A teacher lists four statements for students to interpret. Which table of information correctly distinguishes between the statements?
A
B
C
D
Which description is the best example of a population?
all of the red foxes in a forest
all of the red foxes in every forest
all of the organisms in a forest
all of the organisms in every forest
The Isthmus of Panama is a narrow strip of land that lies between the Caribbean Sea and the
Pacific Ocean. It forms a land bridge that links North and South America. The formation of this
isthmus separated two bodies of water that had previously been connected. How did the
formation of this land bridge most likely influence the development of distinct marine species
on either side of the land bridge?
by decreasing genetic drift
by causing a founder effect
by increasing the rate of genetic mutation
by preventing related populations from interacting
Which statement describes how a mutation would most likely affect a population?
Genotypic variation will increase in the population.
Genotypic variation will decrease in the population.
The occurrence of a preexisting gene will increase in the population.
The occurrence of a preexisting gene will decrease in the population.
Which condition would most likely result in an increase in the phenotypic variation within a population?
The variety of food available in the habitat decreases.
A mutation leads to individuals with genetic differences.
Competition is reduced for all individuals during the winter.
Climate remains unchanged in the population’s ecosystem.
Many scientists have concluded that whales and dolphins have a more recent, common ancestor than do whales and sharks. Which characteristic most likely allowed scientists to make this conclusion?
species niche
predation behavior
anatomical structure
geographical distribution
Some pistol shrimp within a population do not have eye tissue pockets. What role will natural selection most likely have in the frequency of the alleles responsible for the presence of tissue pockets in the shrimp population over time?
Natural selection will increase the allele frequency for tissue pockets because they are
beneficial to the shrimp.
Natural selection will decrease the allele frequency for tissue pockets because they are
beneficial to the shrimp.
Natural selection will not affect the allele frequency for tissue pockets because the trait is only in a few organisms.
Natural selection will lead to the extinction of the shrimp species over time because the tissue pockets could cause poor vision.
