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?
A.The lizard preys on the snake
B.The lizard is a parasite of the snake
C.The snake and lizard use the same limiting resource
D.The snake is a keystone species in the ecosystem

Is it D?

Question

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? 
A.The lizard preys on the snake 
B.The lizard is a parasite of the snake 
C.The snake and lizard use the same limiting resource 
D.The snake is a keystone species in the ecosystem

Is it D?

anonymous · Answer

@Mertsj @poopsiedoodle

poopsiedoodle · Answer

I'm thinking it's A, but I dunno. What's a keystone species?

anonymous · Answer

Keystone Species - A species that has a strong influence on its ecosystem and holds it together.
@poopsiedoodle

anonymous · Answer

I was thinking it was: D.The snake is a keystone species in the ecosystem

anonymous · Answer

It logically doesn't make sense for a lizard to eat a snake...

petiteme · Answer

I'd guess it's C.The snake and lizard use the same limiting resource Lol

anonymous · Answer

That is what I thought, too. :-) lol