Which of these does not explain why food chains have low levels of ecological efficiency?

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?

Which enzymes break down carbohydrates?