Which of these molecules is a nucleic acid? a.) RNA
d.) enzymes
c.) DNA
d.) nucleotides

What is thought to have caused the mass extinction at the end of the cretaceous period?

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

How do all types of diffusion/passive transport actually ‘work’ without using even the smallest amount of cellular energy?