A)
Consider the following scenario:
An animal is born with a shorter tail. This makes no difference to its ability to survive or
reproduce, but as a result of pure luck, the animal survives, reproduces, and passes its shorter
tail down to its offspring. Over time, the species develops a shorter tail.
What type of process is described in this scenario?
(1 point)
genetic drift
artificial selection
genetic modification
natural selection
natural selection
A) The process of altering the genome of one species by adding genes from another species in
order to gain a beneficial trait is known as (1 point)
genetic modification.
genetic drift.
artificial selection.
natural selection.
genetic modification
A)
Consider the following scenario:
Some fish in a murky underground lake have lighter scales than the others. This makes it
slightly harder for the lighter fish to escape detection by predators, but most light-colored fish
live long enough to reproduce. A natural event separates the dark-scaled fish from their lightscaled cousins, and as a result, a new species of dark-scaled fish emerges.
Which statement accurately describes the scenario?
(1 point)
The fish survived because of an inheritable advantage.
The fish experienced an evolutionary change because of natural selection.
The fish survived because of a non-genetic advantage.
The fish experienced an evolutionary change because of genetic drift
The fish experienced an evolutionary change because of natural selection.
A) Which scenario accurately describes an example of artificial selection? (1 point)
A woman who worked hard to become a superior athlete has children who also turn out to be
dedicated athletes.
A farmer intentionally breeds oranges to be more resistant to aphids.
A seal living in a coastal region where food is abundant thrives and reproduces because of the
abundance of food.
A scientist modifies the genes of a tomato plant to make it more resistant to disease.
A farmer intentionally breeds oranges to be more resistant to aphids.
A) Over many generations, there is a good chance that an advantageous gene will be shared
by every organism of the same species or that a new species will emerge. These long-term
outcomes are called (1 point)
population.
evolution.
adaptation.
hybridization.