Why have paleontologists not found any rock from the earliest years of

Earth's existence?

Which statement about DNA replication is true? A. Eukaryotes only have one circular chromosome that unwinds at multiple locations. B. Prokaryotes only have one origin of replication to initiate replication. C.

what would be the first step in using PCR to copy a gene? A. Various strands of DNA are allowed to cool B. DNA is heated to separate strands C. DNA polymerase adds nucleotides to separate strands. D.

Class II MHC proteins are found on which of the following cell types? View Available Hint (s) Class II MHC proteins are found on which of the following cell types? antigen-presenting cells all nucleated cells

Which objects are used in modern mapmaking? Check all that apply. satellites automobiles GPS units compasses computers

Who is one pioneer in autopsy? What did this person contribute to the practice of autopsies?

1. Extracellular calcium enters the axon terminal, triggering the exocytosis of acetylcholine. 2. Acetylcholine is removed by acetylcholinesterase. 3. Acetylcholine binds to receptors and depolarizes the postsynaptic membrane. 4.

What is the function of the waxy, transparent top layer of leaves? A. It produces glucose. B. It releases oxygen. C. It absorbs light energy. D. It prevents water evaporation.

Within the body all molecules in the body can be found inside cells true or false

Using your knowledge of DNA, why do you think we need RNA, if we already have DNA in our bodies?

Is radioactive part of Bio? or no?