If Two Populations Are Re-Introduced After Being Genetically Isolated for a Long

question 71

Multiple Choice

If two populations are re-introduced after being genetically isolated for a long time, how could you tell if they've become two different species?

• A) If they fight with each other, they must be two different species.
• B) If they are unable to interbreed successfully, they must be two different species.
• C) If they avoid each other completely, they must be two different species.
• D) If they were genetically isolated for a long time, they must be two different species.
• E) There's no way to determine whether they've become two separate species.

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Definitions:

Head Circumference

A measurement of the distance around the largest part of the head, used to assess brain growth and development in infants and young children.

Anterior Fontanel

The soft spot on the top of a baby's head where the skull bones have not yet fused together.

Newborn

A term describing an infant who is less than one month old.

Thyroxine (T4) Level

A measurement of the concentration of thyroxine, a hormone produced by the thyroid gland, in the bloodstream.