Venous valves are responsible for A) preventing anterograde flow. ...

[daltonest1984]

Venous valves are responsible for
 A) preventing anterograde flow.
  B) channeling blood away from the heart.
  C) channeling blood toward the heart.
  D) preventing blood from re-entering a ventricle.
  E) regulating blood pressure in veins.

Question 2

During meiosis I, maternal and paternal chromosomes come together during the process called ________ to form a ________.
 A) synapsis; chromatid
  B) prophase I; chromatid
  C) synapsis; spermatid
  D) metaphase II; tetrad
  E) synapsis; tetrad

[mcni194]

Answer to Question 1

C

Answer to Question 2

E

[daltonest1984]

Great answer, keep it coming

[samiel-sayed]

Gracias!