What are male reproductive cells in a plant called?
A. egg
B. pollen
C. stem
D. sperm

6. in the dna double helix, how are the two strands of dna held together? a. chemical bonds between base pairs hold the two strands of dna together. b. hydrogen bonds between the base pairs hold the two strands of dna together. c. hydrogen bonds between sugar groups and phosphate groups hold the two strands of dna together. d. chemical bonds between sugar groups and phosphate groups hold the two strands of dna together.

What are genotypes? what are phenotypes?

List five ways we are indebted to phytoplankton