A) That These Organisms Are Phenotypically More Similar to Each

question 51

Multiple Choice

A) that these organisms are phenotypically more similar to each other than to any others shown on the trees in Figure 26.2.
B) that their morphological similarities are probably homoplasies.
C) that they had a common ancestor.
D) that all three of the responses are correct.
E) that two of the responses are correct.
Answer: C
-One morphological feature of modern cetaceans is a vestigial pelvic girdle. If it is determined that cetacean lineage diverged from the artiodactyls' lineage after the divergence of pigs and other artiodactyla, then what should be true of the vestigial pelvic girdle of cetaceans?

• A) It should be considered a shared ancestral character of the cetartiodactyls.
• B) It should be considered a shared derived character of the cetartiodactyls.
• C) It should be considered a shared ancestral character of the cetaceans.
• D) It should be considered a shared derived character of the cetaceans.

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Definitions:

Sample Space

The set of all possible outcomes or results that can occur from a specific action or a random experiment.

Sample Space

The set of all possible outcomes of a probabilistic experiment.

Probabilities

Measures of the likelihood that an event will occur, expressed as numbers between 0 and 1, where 1 denotes certainty.

Outcome

A possible result or effect of an action, situation, or experiment, which can be measured, observed, or evaluated.