The rigid but flexible structure of these pea pod is enhance by the presence of plant cell

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.

During endocytosis, cells expel what they don't need take in what they need shrink due to loss of water

What is the identity of the planets?