Question from campbell biology chapter 16:
51) what is the basis for the difference in how the leading and lagging strands of dna molecules are synthesized?
a) the origins of replication occur only at the 5' end.
b) helicases and single-strand binding proteins work at the 5' end.
c) dna polymerase can join new nucleotides only to the 3' end of a growing strand.
d) dna ligase works only in the 3' → 5' direction.
e) polymerase can work on only one strand at a time.

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides

In what locations does this text suggest you might find zooflagellates living? fresh water lakes on the surface of leaves inside other organisms on damp forest floors