What trophic level do herbivores occupy in a food chain?

Formaldehyde is used in the manufacture of: medicine Glass acids plastics

Which blood vessels supply deoxygenated systemic blood to the alveoli?

Invelisul chitinos reprezinta exoscheletul: a. Coralilor b. Melcului-de-gradina. c. Paianjenul. d. Scoicii-de-lac. ?

The main source of energy for most living thing is

Match the terms to their definition. 1. dominant a gene or trait that is masked when a dominant gene is present 2. genotype a gene or trait that always expresses itself 3. hybrid an organism with one dominant gene and one recessive gene 4.

Is it possible to have a food web without producers? Explain

Waves in the ocean transfer energy in which direction?

Liza is an early-maturing girl who just reached menarche. She is very upset and is having a difficult time adjusting. Which of the following is the most likely reason for Liza's feelings? a.

Tonya plans to use the lab instrument that is shown below in an experiment. Which property of matter does the instrument measure?

All energy is any ecosystem starts as