Which of the following statements about viruses is true?
a. they do not mutate and evolve.
b. they do not contain genetic information.
c. they carry out physiological functions on their own.
d. their existence depends on cells

What are charcteristics of lithosphere?

Which process is represented a.) deletion b.) nondisjunction c.) translocation d.) insertion

In cattle a single gene with two alleles determines fur color the fur can be red white or roan roan fur has both red and white hair which of the following statements is true a the allele for roan fur color is dominant over red and white fur color b the allele for red fur color is dominant over white and roan fur color c the roan and white alleles are expressed independently of the other d the red and white alleles are expressed independently of each other