Why didn't alexander fleming see the mold spore fall in the petri dish

Which identifies the main purpose of biological taxonomy?

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from