The role of environmental factors in cellular differentiation is to
a. induce or repress gene expression.
b. assist a cell in dividing and transmitting its dna to new cells.
c. prevent a cell from dividing and transmitting its dna to new cells.
d. destroy or repress genes so they are repressed.

How are the reproductive cycles of a fungus and a pteridophyte similar? a)both organisms form fruiting bodies that produce diploid seeds. b)both organisms produce haploid spores and exhibit diploid and haploid stages. c)both organisms reproduce sexually when two haploid hyphae fuse. d)both organisms exhibit a diploid stage and are only able to reproduce asexually.

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.

What organ is the first to receive nutrients that have been absorbed from the digestive tract?