¿ como las acciones del ser humano, como la contaminación, la caza, el uso excesivo de recursos, afectan la estabilidad de las cadenas y redes tráficos en una comunidad biológica?

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

What is a gene ? a) a section of a protein that codes for dna. b) the alternate version of a trait. c) the visible trait in the f1 generation. d) a section of dna that codes for a specific trait .

What amino acid is coded for by this sequence after the mutation