The first line of defense involves which structure(s)?

T-cells
B-cells
blood
skin

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.

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down