Adult male humans generally have deeper voices than do adult female humans, which is the direct result of higher levels of testosterone causing growth of the larynx. If the fossil records ofapes and humans alike show a trend toward decreasing larynx size in adult females and increasing larynx size in adult males, then

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#Question id: 10677

#Section 2: Evolution

What interactions occur in epiphyte plants that grow on other plants?

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#Question id: 12755

#Section 5: Applied Ecology & Evolution

Which of the following statements best describes why biologists are currently concerned with global warming and the thawing of permafrost in many areas of the tundra biome?

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#Question id: 11054

#Section 2: Evolution

In red grouse populations on the grasslands, many males do not acquire territories. Which of the following is least likely to be a valid hypothesis about these male grouse?

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#Question id: 10752

#Section 1: Ecology

Which of the following is an example of Batesian mimicry?

A) a butterfly that resembles a leaf

B) a nonvenomous larva of a moth that moves like a venomous snake

C) a fawn with fur coloring that camouflages it in the forest environment

D) a snapping turtle that uses its tongue to mimic a worm, thus attracting fish

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#Question id: 10632

#Section 1: Ecology

Three different population growth pattern related to population density are shown in figure