Normal cells become cancer cells when a. cells do not respond normally to control mechanisms.
b. regulation of cell growth and division is lost.
cells continue to divide without passing through G1.
d. All of the above

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.

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

Organize the following objects from lowest volume to highest volume