Which type of cells do scientists believe went on to produce energy in the form of atp?

The population of whales would decrease.

Explanation:

Organisms feed on one another in their name environment in order to obtain energy needed for their life processes. The habitat described here is aquatic, and it involves a series of organisms involved I feeding pattern called FOOD CHAIN. Every food chain starts with an autotroph i.e. an organism that is capable of making Its own food by trapping light energy from the sun.

This autotophs are called PRODUCERS. The producer in this case are PHYTOPLANKTONS, which starts the food chain. If the population of the producer (phytoplanktons) decrease, there will be a reduction in the number of consumers at each trophic level i.e. the number of krills and whales will also decrease because only a producer is capable of starting a food chain.