UN ANIMAL TIENE CIRCULACIÓN CERRADA SIMPLE CUANDO:

a) no tiene hemoglobina b) no tiene sangre

c) la sangre pasa una sola vez por el corazón en un recorrido.

d) la sangre pasa 2 dos veces por el corazón en un recorrido.​

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.

What is the one part of the nucleotide  that differs among the other different nucle  tides?

Produce proteins by following coded instructions that come from the nucleus of the cell.