Water is warmed by the sun and it is cooled and finally it is brought back to earth in the form of

The diagram illustrates the activity of vesicles during a cellular process.

Depending on the organism the number of in a cell may change

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.