Which statement best compares coral reef ecosystems to demersal ecosystems?

coral reef ecosystems have high levels of nutrients in the water, and demersal ecosystems do not.
coral reef ecosystems are typically in shallow water, and demersal ecosystems can exist at any depth.
coral reef ecosystems can support large fish like sharks and rays, and demersal ecosystems cannot.
coral reef ecosystems may have starfish, clams, and other invertebrates, and demersal ecosystems have only fish.

Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+

What condition is kept close to its set point in osmoregulation? a. body temperature b.platelet count c.blood glucose level d.water balance

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4