If the primary producers in a 5-level trophic pyramid produce 100,000 calories, how much of that energy will reach the apex predator? a 10 calories b 1000 calories c 10,000 calories d 1 calorie

It is 5 level trophic pyramid.The amount of energy decreses as 10 percent when it move from one trophic level to the next.

Primary producers-100,000 calories

2nd trophic level-100,000*10/100=10000

3rd trophic level-1000

4th trophic level-100

5th level-10

so the apex predator would have 10 calories of energy.