If Two Sister Species on the Phylogenetic Tree Above Differ

question 8

Multiple Choice

If two sister species on the phylogenetic tree above differ from the other two in a single character state (say dark or light fur) ,how many character state changes (evolutionary events) are needed to explain this pattern?

• A)One
• B)Three
• C)Two
• D)Four

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Definitions:

Blood Flow

The movement of blood through the circulatory system of an organism, delivering oxygen and nutrients while removing waste products.

Correct Sequence

The arrangement of things in a particular, proper, or desired order, often applied to the arrangement of nucleotides in a DNA molecule or amino acids in a protein.

Semilunar Valves

Valves located at the exits of both the heart's ventricles, preventing backflow of blood into the heart during contraction.

Moving Backward

The process of going in a direction opposite to the one that is considered forward or advancing.