Two groups of shrimp are considered by scientists to be sympatric. Which must be true of these two groups?

Neither group is subject to natural selection.
Neither group will show a change in change in gene frequency over time.
Some barrier to reproduction exists between individuals of the two groups.
Food resources must be the same between the groups.
The two groups must mate at the same time of year.

Question

Two groups of shrimp are considered by scientists to be sympatric. Which must be true of these two groups?
 	
	Neither group is subject to natural selection.
	Neither group will show a change in change in gene frequency over time.
	Some barrier to reproduction exists between individuals of the two groups.
	Food resources must be the same between the groups.
	The two groups must mate at the same time of year.

anonymous · Answer

Food resources must be the same between the groups.