What is the study of the harmful effects of chemicals on humans and other organisms?

What does resonance result in? quieter sounds frequency amplitude louder sounds

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells