Taking a post condition is a cause of impotency in men? a. undescended testicles that persist beyond puberty b. the inability of the penis to become erect c. a vasectomy, which is a surgical procedure to cut the vas deferens d. a low production of sperm in the testes e. the absence of the vas deferens in a male from birth

How do tides affect the organisms living in intertidal zones? a. no organisms live in intertidal zones due to the tumultuous environment. b. the mechanical forces of the waves keeps the organisms clean. c. only plants live in intertidal zones because the animals float away with the waves and never return. d. the mechanical forces of the waves can dislodge the organisms from their habitat.

The table below shows the elements that mainly comprise each of the four layers of earth: elements in layers layer main elements crust oxygen, silicon mantle iron, magnesium outer core iron, nickel inner core iron which of these elements make up the layer that is 0.2 to 1.1 percent of earth's total diameter?

Can someone give me the answers to this?