What is the main evidence of life on ancient earth?
A. dinosaur fossils
B. rock impressions of bones
C. plant remains
D. cyanobacteria fossils

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

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Twind is considered to be an abiotic factor because it.?