How Does an Evolutionary Tree Provide Evidence of Speciation, or the Idea

question 17

Multiple Choice

How does an evolutionary tree provide evidence of speciation, or the idea that one species arises from another?

• A) The tree's branches are interconnected and organized with one branching from the next, and there are fewer branches as you move back in time.
• B) Evolutionary trees are pretty much made up by scientists so they don't really provide evidence of anything.
• C) The DNA on the branches changes in a consistent manner over time, suggesting constant change.
• D) The tree represents generations just like a human family tree.
• E) Organisms lower on the tree branches clearly evolved from organisms higher on the tree branches.

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Definitions:

Resistant to Extinction

Refers to the persistence of learned behaviors or responses after the reinforcement has been eliminated.

Rewarded Behavior

Actions that are positively reinforced, increasing the likelihood of their recurrence.

Discriminative Stimulus

In operant conditioning, a stimulus that indicates that reinforcement is available.

Skinner Box

An experimental apparatus developed by B.F. Skinner for studying behavioral conditioning in animals, typically involving a lever they press to receive a reward.