Is the dry weight of tissue and other organic matter in an ecosystem a) biome b) biomass c) biology d) biodiversity

Analogy- 1 is to arete as 5 is to cirque horn glacial valley hanging valley

How can you tell the difference between rough er from smooth er?

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