Which is the best explanation for the observation that the nuclear DNA of wolves and domestic dogs has a very high degree of sequence homology

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

What are the fixed alleles in the human species? o a. the alleles that are on the most chromosomes b. the alleles that change most often 000 c. the alleles that no one has d. the alleles that everyone has

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.