The federal agency primarily responsible for protecting our environment from contamination by hazardous materials releases is:
a. the federal emergency management agency
b. the department of transportation
c. the department of labor
d. the environmental protection agency

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.

92 sathe best for the question 11. most animals and plants reproduce sexually. this means that dna is passed down to new organisms from two parental organisms. which of the following is a key advantage of sexual reproduction?

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.