Why doesn't the crust layer of the Earth get larger since new crust is always being made? A
B
C
D

Why aren't the stains like crystal violet and safranin washed away with water during simple staining?

Ascientist separates a population of mice into two groups. what would most likely increase the rate of speciation in this population. a. teach the two groups different tricks b. allow the two groups to breed with each other c. put the two groups in different environment d. have the two groups live in identical ecosystems

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.