( i need help with this question!!)sickle cell amenia is a mutation that results in irregularly shaped red blood cells. The disease is very common in the african american population. Explain how this mutation is BOTH harmful AND beneficial.

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.

Why reason best illustrates why hershey and chase chose to use viruses in their experiment?

Describe the relationship between isotonic solutions, equilibrium, and water movement into and out of a cell.