Approximately, when did mendel and darwin develop their ideas?

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

Each member of a class sampled a piece of ptc testing paper. thirty people sampled the chemical. twenty persons were tasters. how many had heterozygous genes? 10 20 0-20 indeterminate

Afossil of a sable antelope with his i was observed in the topmost layer of soil a fossil of a zebra was found in low at the bottom layer contains fossils of a blue in this discovery tells us that what