Age and hormone production will affect how our genes are expressed and how they function. These are examples of influences.

A. external
B. internal
C. sex-linked
D. polygenic

this protocol describes a detailed procedure for intracellular flow cytometry staining.

the sun creates it's own light, also gives light and life to bunch of stuff like plants,animals,humans etc.photosyntesis is the process of making food which needs sun,water,nutrients etc.

this would be called the responsiveness