Choose two ways carbon returns to the carbon cycle from animals? #1: When animals breathe, they breathe in oxygen.
#2: When animals breathe, they release carbon dioxide.
#3: Animals do not return carbon to the atmosphere.
#4: When animals die, their remains are recycled by decomposers, releasing carbon into the soil.

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Dna replication or repair occurs in a cell in all of thw following situations except when