Natural selection is best described as
A. a change in an organism in response to a need of that organism
B. a process of nearly constant improvement that leads to an organism that is nearly perfect
C. differences in survival rates as a result of different inherited characteristics
D. inheritance of characteristics acquired during the life of an organism
What can happen to a species over time if some of the organisms have an advantage?
A. The population will decrease
B. The population will become extinct
C. The population will slowly increase
When organisms are better adapted to their environment they will survive and reproduce more successfully than organisms less adapted. This process is called what?
A. Selective breeding
B. Natural Selection
D. Evolution of all species
When an organism has a trait that allows it to blend in with its environment, we call that ____.
D. sonic hedgehog gene
Mutations are important because they bring about
A. death of the organism in which they develop
B. genetic variation needed for a population to evolve
C. benefits for the individual, not for the population
D. Hardey-Weinberg equilibrium within a population
Horse ancestors had individual toes/paws. Why don’t we see horses with individual toes/paws anymore?
A. It isn’t an advantage
B. It was too helpful
C. It helped them run faster
These moths are all the same species. The differences between their wings is an example of ________________
A. Natural Selection
Based on the cladogram shown, which species’ DNA would you predict is most similar to the DNA of the toothed whale?
B. Baleen Whale
C. Grazing Mammals
A physical or behavioral trait that helps an organism survive and reproduce in its environment is called a what?
A. An adaptation
B. A response to a stimulus
C. A mutation
What do we call structures that no longer perform their original function?
A. Natural Selection
B. Analogous Structure
C. Vestigial Structure
D. Homologous Structure
When an animal looks like another animal it is called ______________.
C. warning coloration
D. protective resemblance
The white feathers of a snowy owl allow it to blend in with its environment during the winter months (snow). This is an example of ________________
B. Environmental Change
An owl is mostly nocturnal meaning it hunts and is active at night.
A. Behavioral Adaptation
B. Structural Adaptation
____________ is when an animal blends into its environment.
C. warning coloration
A remnant or trace of an organism from the past is called a _______.
Which occurrence represents an example of evolution?
A. Exposure to radiation reduces the rate of mutation in leaf cells.
B. A mutation in a liver cell causes a person to produce an enzyme that is less efficient.
C. Cells in a zygote eventually change into bone cells or skin cells
D. Some antibiotics are almost useless, because pathogens have developed a resistance to these antibiotics.
Which of the following is NOT an example of natural selection?
A. People selectively breeding hamsters.
B. Insect populations developing resistance to certain pesticides.
C. Bacteria becoming resistant to antibiotics.
D. Male birds of certain species developing colorful feathers to attract female mates.
Why are advantageous traits more likely to be passed onto offspring?
A. Because they are more likely to survive and reproduce.
B. Because they come from dominant alleles.
C. Because they come from recessive alleles.
D. Because the trait is an acquired phenotype.
Darwin said that within a species there will be _________________________
A. nothing different
Why is the mouse population changing over time?
A. The light mice can reproduce more successfully than the dark mice
B. The hawks eat more dark mice than light mice because the dark mice taste better
C. The hawks eat more light mice than dark mice because they can see the light mice more easily
D. The hawks eat more dark mice than light mice because they can see the dark mice more easily
What might account for the fact that all of these limbs share similar structures?
A. They share a common ancestor
B. They are all from one animal
C. They are very similar organisms
Which of the following explains adaptation.
A. An individual organism changes to meet its needs in the environment. These changes pass down to their offspring.
B. The species as a whole changes their characteristics.
C. Beneficial traits allow organism to survive and pass on those traits
D. New characteristics arise in a species as needed. If these traits are helpful, they are passed down.
The environment around Manchester, England, changed during the Industrial Revolution. How did this change affect peppered moths living in the area?
A. Natural selection favored moths with dark wings because predators could not see them on the soot-colored trees.
B. Natural selection favored moths with white wings that were easy for predators to see.
C. Natural selection favored moths with white wings because predators could not see them on the soot-colored trees.
D. Natural selection caused moths with white wings to become extinct.
Which of the following is NOT considered evidence of evolution?
A. similar DNA
B. similar development
C. similar behavior
D. vestigial structures
If species A and B have very similar genes and proteins, what is probably TRUE?
A. species A and B share a relatively recent common ancestor
B. species A evolved independently of species B for a long period
C. species A is younger than species B
D. species A is older than species B
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