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.

The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

What must be done to breed dogs for a partical trait

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