Students from the University of Georgia are completing a field study to determine the impact the American alligator has on ecosystems over a 3-month period. In one area of the ecosystem, the students have removed the alligators and in another area they have left the alligators. What is the hypothesis the students are testing?

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above