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WorksheetsBiology EOC Evolution
Total questions: 25
Worksheet time: 25mins
A scientist studying the evolution of a species of sea scallop wrote the following description of its evolution:
“The fossil record shows several periods of rapid speciation. Each period spans several thousand years. The speciation periods are separated by hundreds of thousands of years where no changes were observed. During the short speciation periods, many different species evolved rapidly.”
The scientist concludes that the evidence supports one form of evolutionary change. Which form is BEST supported by the evidence cited?
gradualism
coevolution
convergent evolution
punctuated equilibrium
Which cellular organelle is thought to have evolved from a prokaryote that was able to use oxygen?
chloroplast
Golgi apparatus
mitochondrion
ribosome
Which statement provides evidence that mitochondria MOST likely evolved when a primitive eukaryotic cell engulfed a prokaryotic bacteria?
Both mitochondria and bacteria have a circular DNA molecule.
Both mitochondria and bacteria have the same type of ribosomes.
Both mitochondria and bacteria have a double-membrane nucleus.
Both mitochondria and bacteria have the same amount of cytoplasm.
According to the fossil record, when did episodes of rapid speciation commonly take place?
while Earth’s continents were joined
while Earth’s habitats were stable
before major climatic changes
following mass extinctions
What is the term used to describe the movement of alleles between populations?
Genetic drift
Gene flow
Natural selection
Mutation
Which statement BEST explains why evolution is classified as a theory?
It is a set of hypotheses supported by scientific findings.
It has been proved by valid scientific experiments.
It explains observations more simply than other available models.
It is accepted by a majority of scientists working in relevant fields,
The discovery of a fossilized animal with teeth, a long bony tail, and feathered wings helped to establish which evolutionary sequence?
rodents to bats
reptiles to birds
aquatic organisms to land-based organisms
invertebrates to flying organisms
Fossil records indicate that species changes generally
stop when a species forms.
speed up with stable conditions.
take place over many generations.
are independent of the environment.
According to the endosymbiotic theory, the outer membrane of the chloroplast originated from which organelle?
the lysosome of an engulfed prokaryotic cell
the chloroplast of an engulfed prokaryotic cell
the cell membrane of an eukaryotic host cell
the chloroplast of an eukaryotic host cell
Rhinoceroses and horses are related. They have very similar digestive systems and an odd number of toes on their feet. Horses have one toe, and rhinoceroses have three. These facts BEST support which claim?
Horses and rhinoceroses share a common ancestor.
Horses and rhinoceroses are genetically identical.
Horses are the ancestors of modern rhinoceroses.
Horses have descended from modern rhinoceroses.
All dogs have the common ancestor, the wolf. This is an example of -
divergent evolution
convergent evolution
Which of the following is an example of a vestigial structure?
the wings of a red-tailed hawk
the hind limbs of a house cat
the fins of sharks
the wings of an ostrich
Some organisms that share a common ancestor have features that have different functions, but similar structures. These are known as
vestigial structures
analogous structures
homologous structures
fossil structures
Two organisms that are closely related would have
very similar DNA sequences
exactly the same DNA sequences
no proteins in common
completely different DNA sequences
The hind leg bones in a whale are examples of
homologous structures
analogous structures
fossils
vestigial structures
Darwin’s finches is an example of this type of evolution.
Divergent
Coevolution
Convergent
Artificial
Wings of a bat and wings of an insect are examples of this...
Homologous Structure
Analogous Structure
Vestigial Structure
None of the above
What does it mean when organisms share a common ancestor?
They evolved from one species that lived in the past
They are the same species
The organisms have exactly the same traits
The organisms are very different from one another
If an organism has a vestigial structure, that structure likely once had a function in a(n)
close relative
early ancestor
unrelated organism
embryological stage
Evolution is a THEORY and is subject to change if new evidence is found.
True
False
Using the CLADOGRAM, which letters represent the closest in evolution?
A and B
B and E
C and D
C and E
Which of the following best describes the concept of natural selection?
A) The random change in allele frequencies in a population.
B) The process by which organisms better adapted to their environment tend to survive and produce more offspring.
C) The movement of genes from one population to another.
D) The formation of new species from existing species.
What evidence supports the theory of evolution by common descent?
A) The presence of vestigial structures in organisms.
B) The occurrence of genetic drift in small populations.
C) The existence of analogous structures in different species.
D) The process of artificial selection in agriculture.
Which experiment would best demonstrate the principle of adaptive radiation?
A) Observing the beak variations in finches on the Galápagos Islands.
B) Measuring the growth rate of bacteria in different nutrient media.
C) Comparing the DNA sequences of different mammalian species.
D) Studying the migration patterns of birds across continents.
How does the fossil record provide evidence for evolution?
A) It shows that all species have remained unchanged over time.
B) It reveals the existence of transitional forms between different groups of organisms.
C) It indicates that all life forms appeared simultaneously.
D) It demonstrates that genetic mutations occur at a constant rate.
