PLEASE HELP :) Can someone please explain what secondary production and the green world hypothesis mean in simple terms? Thank you :D

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.

Epithelium is connected to underlying connective tissue by