One scientific hypothesis about the origin of life holds that

A.

RNA replaced DNA as the most stable information-storing molecule.

B.

RNA existed before DNA.

C.

proteins that duplicate themselves came to function in information storage.

D.

as cells evolved they stopped using RNA entirely.

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?

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?