WorksheetsUnit 4 Study Guide Evolution
Total questions: 20
Worksheet time: 10mins
There are five species of the Texas state flower, the bluebonnet. Each flower is found in a different region of Texas and has slightly different traits. What most likely accounts for this variation?
Natural selection
Genetic Engineering
Selective Pollination
Selective Breeding
How does the fossil record best support the theory of evolution?
It shows population changes over time.
It shows structural changes over time.
It shows behavioral changes over time
It shows geographic changes over time.
An adaptation is a trait that helps organisms
Overproduce variation
Become smaller and weaker
Survive and reproduce
Become less diverse
Natural selection is the mechanism that
This leads to increasing variation within a population
Explains why populations produce more offspring than the environment can support
increases the chance of certain individuals reproducing
Allows a weaker species to reproduce more frequently
Charles Darwin's studies of finches on the Galápagos Islands suggest that the finches' differences in beak structure were caused by which of the following?
The mating behaviors of the different finch species
the acquired characteristics of the parent finches
the sizes of the islands on which the finches lived
the adaptations of the finches to different environments.
Based on the diagram, it is plausible that the giraffe formed.
More spots to attract mates to produce offspring
A longer neck to reach food in higher areas when food is scarce
Longer legs to attack predators that approach
A narrower head to reach deep into trees and eat food that is hard to reach
Hummingbirds have long, slender beaks that allow them to feed on the nectar of deep-throated flowers. One hummingbird is born with a short, stout beak as a result of a genetic mutation. What is the most likely result?
This hummingbird will eat insects and spiders instead of nectar
This hummingbird will not live as long as other hummingbirds
This hummingbird will build a bigger nest than other hummingbirds
This hummingbird will attract more mates than other hummingbirds.
What most likely caused the variations in Darwin’s finches?
The available water on the islands
The number of mates on the islands
The temperatures on the islands
The available food on the islands
The diagram shows a population of mice just after moving into an area with dark sand and
after many generations.
Which explanation is best supported by the
diagram?
The light mice had fewer predators.
The dark mice had less favorable traits.
The light mice were better able to reach
reproductive age
The dark mice were better able to reach
reproductive age.
Which of the following is true of reproduction?
Only small organisms have a high chance to reproduce.
On average, the fittest organisms pass on genes to the next generation.
Only small organisms have a high chance to reproduce.
All beneficial genes are passed on to the next generation.
Which of the following would be least likely to form fossils that support the theory of evolution?
The bones of organisms
The teeth of organisms
The skin of organisms
The shells of organisms
Which layer of rock is the oldest?
Layer B is the oldest.
Layer A is the oldest.
They are all the same age
Layer D is the oldest.
Darwin's scientific theory of evolution explains and predicts which of the following?
Extinct species are NOT related to living species
Competition for mates and food does NOT cause changes in populations
Variations in populations do not affect natural selection
Species change over time
What were the dominant land animals during the Jurassic and Cretaceous periods as suggested by the fossils found?
Grazing animals
Human ancestors
Dinosaurs
Amphibians
What variation of an individual owl in an owl
the population would make the individual most likely
to survive in an environment where the owl's prey
is scarce?
having better eyesight to spot prey more easily
having fewer feathers to increase agility
having shorter wings to increase flight speed
having bigger nests to support more offspring
What will most likely happen if the gene
frequencies in a given population remain
constant?
Evolution will not take place within the
population.
Evolution within that population will occur at a
faster rate
Dominant characteristics will increase in the
population.
Recessive characteristics will increase in the
Population.
How should the fossils in the sediment layers of
Does earth appear if species have evolved?
The upper layers should contain fossils of more complex
organisms.
All of the layers should contain fossils of
complex organisms.
All of the layers should contain fossils of simple
organisms.
The lower layers should contain fossils of morecomplex
organisms.
The picture shows the change that occurred in an
insect population over 10 generations. The most likely explanation for this change is
that over time there was
.an increase in the need for insects with longer
legs
. an increase in the need for spots on the wings.
a decrease in the need for spots on the wings
a decrease in the need for insects with longer
legs.
According to Darwin's theory of natural selection,
certain individuals will leave more offspring on
average than other individuals. Why is this true?
Certain individuals possess adaptations that are
acquired through use.
Certain individuals do not compete with other
members of the same species.
Individuals that reproduce sexually will leave
more offspring than those that reproduce
asexually.
Certain individuals possess inherited
adaptations that are well-suited to the
Environment.
A population of birds has many small variations
among the individuals in the population. Variation
in beak size among these birds would affect their
survival most of the
type of food available in the area changes
size of nesting areas decreases.
weather in the environment changes.
amount of water available in the area decreases
