Focusing on which two central themes in biology would help a student understand why animals come in different shapes and sizes?
a. cellular basis for life; homeostasis
b. structure and function; unity and diversity of life
c. matter and energy, homeostasis
d. science as a way of knowing; interdependence of nature

Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users