Consumption by tertiary consumer A 20-kilogram river otter (a tertiary consumer) requires the energy harnessed by about kg of primary producers. Assume that 90% of the energy at each trophic level is lost as heat.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing