Actin functions in cell migration by: a. creating an actin meshwork at the lamellipodia
b. using myosin to generate force and movement
c. probing the cell periphery using dynamic instability
d. treadmilling actin monomers

Enzymes are proteins that speed up reactions by providing an additional energy source supplying additional molecules for the reaction removing inhibitors that slow down reactions lowering the amount of energy required

As a small change in a person's dna can cause a genetic disorder

Acertain species of fish can have either long or short fins. the allele for long fins is dominant over the allele for short fins. a heterozygous, long-finned fish is crossed with a homozygous, short-finned fish. of the offspring, will have long fins and be , and will have short fins and be .