Which phrase best describes cellular respiration? A- the process where there is a movement of water across a membrane
B-the physical division of the cell's cytoplasm
C-the process that cells use to obtain energy from food
D- the process where there is a movement of molecules to balance out their distribution

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.

Which would be the most useful source of evidence to support mcneill's contention?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim