Evolution/Natural Selection Flashcards
Which layer is the oldest
not the top
What is an amniote
vertebrate animals whose embryos develop inside the set of protective membranes
What does “the fittest” mean in an evolutionary sense?
The most reproductively successful.
Which lived more recently in time, the common ancestor species of A and B or the common ancestor
species of B and C?
common ancestor of B & C
Which of the following provides evidence of evolution from a common ancestor? (select all that apply)
Whales are tetrapods—but living whales do not have four limbs. What is a more accurate way to
describe tetrapods?
Animals that descended from a four-limbed ancestor
_______________structures are derived from the same body part present in a common ancestor, although the structure and the function of the body part may have diverged.
Homologous
Which way does time run on this tree?
From root to branch tip
Which shows evidence of common descent?
homologous structures
The common bone of the upper forelimb in all vertebrates is the
humerus
Why are there few fossils of animals that lack shells or skeletal structures?
Soft tissues decay.
________________ is important to a population because it allows natural selection to occur.
Genetic variation
What are the two key ingredients to natural selection?
Reproduction and variation
Fossils provide each of the following except:
A complete record of past life on Earth
Which traits do B and C share?
1 and 3
What is evolution?
The process of change in living organisms over many generations and long periods of time.
A fossilized species that has characteristics of two distinctly different species is called a
transitional species
In a snowy habitat, a brown bunny is more likely to survive and reproduce than a white bunny rabbit.
False
For a mutation to affect evolution, it must:
Be able to get passed from parent or offspring
The Galápagos finches are an example of an array of species that:
Evolved from a single island species
