Which of the following best describes adversity in terms of natural selection? a. variations exist among members of a species b. many different species exists c. only animals display variation d. all members of a species are exactly the same

What major structure can be used to tell apart the embryos of acoelomates pseudocoelomates and coelomates?

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.

Which process in respiration happens first? a)pyruvate processing b)electron transport chain c)krebs cycle d)glycolysis