Answer:
C) male-male competition; sexual conflict and antagonistic coevolution
Explanation:
Male-male competition happens when two males of a species fight for the opportunity to mate with a specific female.
The answer is high. The relative concentration of water in a hypotonic solution is high .
Energy available to krill is 1500 calories
<u>Explanation:</u>
Energy produced by phytoplankton = 15,000 calories
Energy available to krill = ?
Along the food chain, only 10% of energy is transferred to the organism of higher trophic level.
Thus,
energy available to krill = 
= 1500 calories
Energy available to small fish = 
= 150 calories
Energy available to medium fish = 
= 15 calories
Energy available to large fish = 
= 1.5 calories