the movement of blood from the legs toward the heart is hindered by gravity. the effect of gravity is counteracted by

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth

What evidence did mendel find that supported his law of independent assortment? a. some traits are controlled by several different genes. b. a trait can be passed on from a parent to an offspring. c. most traits have a dominant form and a recessive form. d. different traits are passed on independently of each other.

When a gasoline engine burns gasoline, what type of chemical reaction is occurring?