Thursday
April 24, 2014

Homework Help: Science

Posted by Steve on Thursday, December 26, 2013 at 6:17pm.

A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two species?

The lizard preys on the snake.

The lizard is a parasite of the snake.

The snake and lizard use the same limiting resource.
The snake is a keystone species in the ecosystem.

my answer is D

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