4.1 kg of a plastic, used to make plastic bottles, has a carbon footprint of 6.0 kg of
carbon dioxide.
Calculate the carbon footprint of one plastic bottle of mass 23.5 g

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.

How do living things obtain phosphorus

The arrows indicate the direction of wind flow. which place experiences monsoons?