HURR WILL GIVE Even animals that live deep underwater require air to survive. Why is oxygen a necessity of life?

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?

Types of scientific inquiry that biologist engage in that cannot be completely controlled

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?