The Following Questions Refer to the Evolutionary Tree Shown Below

question 21

Multiple Choice

The following questions refer to the evolutionary tree shown below.
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 labelled 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.

-Which of the five common ancestors, labelled V-Z, has been least successful in terms of the percentage of its derived species that are extant?

• A)V
• B)W
• C)X
• D)Y

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Definitions:

Productive Language

The aspect of language capability that involves producing words, phrases, and sentences to express thoughts and communicate.

Holophrasing

The use of a single word by a child to express a complex idea or sentence, a common stage in language development.

Babbling

A stage in child language acquisition, during which the child spontaneously utters meaningless sounds, often comprising syllables repeated in patterns similar to speech.

Cognitive Disability

A limitation in intellectual functioning and adaptive behavior, affecting learning, communication, and social skills.