The Following Questions Refer to the Evolutionary Tree in Figure

question 41

Multiple Choice

The following questions refer to the evolutionary tree in Figure 22.2.
The horizontal axis of the cladogram depicted below is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.

Figure 22.2
-How many separate species, both extant and extinct, are depicted in this tree?

• A) two
• B) three
• C) four
• D) five
• E) six

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Definitions:

Return Path

The return path is the conductive path that allows current to return to its source in an electrical circuit, completing the circuit loop.

Voltage Drop

The reduction in voltage as electric current passes through components or conductive paths within an electrical circuit, due to resistance or impedance.

Total Resistance

The overall opposition to electric current flow in a circuit, calculated by adding the resistance values of individual resistors in series and appropriately combining resistors in parallel.

Parallel Circuit

An electrical circuit in which components are connected in parallel, such that the voltage across each component is the same, and the total current is the sum of the currents through each component.