The mating of a horse and a donkey produces a mule, which is a viable offspring that is infertile. we would conclude that a. a house and a donkey are members of the same species b. a mule can fall into the species lines of both a mule and a horse. c. a horse and a donkey produce s fertile offspring, not a infertile one d. a horse and a donkey are not of the same species

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

Select the correct answer. which term do biologists use to describe the average number of individuals of a species per unit area? a. carrying capacity b. population density c. minimal viable population d. survivability curve

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.