PT135.S1.Q12

PrepTest 135 - Section 1 - Question 12

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Populations of a shrimp species at eleven different Indonesian coral reefs show substantial genetic differences from one reef to another. ████ ██ ██████████ ███████ ███ ██████ ██████ █████ ████████ ████████ █████ ████ ██████ ███████ ███ █████████ ██████ █████ █████ █████ ███ ███████████ ██ ██████████ ███ ██████ ███████████ ██████████████████

"Surprising" Phenomenon

Why are shrimp at different coral reefs genetically distinct when ocean currents mix up baby shrimp between populations?

Objective

A hypothesis resolving this discrepancy must explain why the intermingling of baby shrimp between reefs is not enough to make those shrimp genetically indistinguishable. It will imply that baby shrimp exchanged between reefs do not breed with each other, or that their interbreeding is not enough to blur the genetic lines between populations.

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12.

Which one of the following, ██ █████ ████ █████ ██ ███████ ███ ███████████ ███████ ███████████ █████ ███ ██████ ████████████

a

The genetic differences ███████ ███ ██████ ███████████ ███ ████ ████ ███████████ ████ █████ ███████ ██████ ███ ███ █████ ██████ ████████

b

The individual shrimp ██████ █ █████ ██████████ ██ ███ █████ ██████████ █████ ████ ██████ ████ ███ ███████ ████████████ ████ ██████ █████ ██ ██████████ █████████████ ██████ ███ ████ ███████████

c

Before breeding, shrimp ██ ███ ███████ ████████ ███████ ████ ██ ███ █████ ████ ██ █████ ████ ████ ████████

d

Most shrimp hatched ██ █ █████ ██████████ █████ ████ ███ ██ ██████ ███████ ██ ████ █████ ████ ████ ████████ ███ ██████ ██ ██████

e

Ocean currents probably █████ ████ ██ ███ ████ ██████ ███████ ██ █ █████ ██████████ █████ ████ ███ ████ ███ ████ █████ ██████ ████ ██ ███████ █████ █████

Confirm action

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