Why does each replication fork require both leading and lagging strand synthesis?
select the 2 reasons below.
a) because dna synthesis is semi-conservative.
b) because dna polymerases must synthesize dna 3' to 5'.
c) because the dna templates are antiparellel.
d) because dna polymerase only synthesizes dna in one direction.

Deserts (especially true deserts) are not easy places for animals to live. animals who live in them often have special features that them survive. which adaptation would be for this group of animals? a) keen eye sight b) short, narrow legs c) tolerate heat d) webbed feet

Chitin is a chemical component of the cell walls

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.