Which fossil occurs on the most landmasses? & what does this suggest about when these particular continents broke up?

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.

Describe the impact of deforestation of both abiotic and biotic factors within the tropical rainforest.

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient