Answer:
A bottom-up cascade is when there is a change to the top level of the energy pyramid
Explanation:
True
Answer:
True.
Explanation:
Please make sure to read this:
In a bottom-up cascade, the population of primary producers will always control the increase/decrease of the energy in the higher trophic levels. ... In a subsidy cascade, species populations at one trophic level can be supplemented by external food.