What is the connection between a circadian rhythm and the biological clock

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

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 of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )