What aspects of the structure of DNA are explained by this model? Select three answer choices.
а
Paired nucleotides are held together by covalent bonds.
b
O
Adenine is paired with thymine and guanine is paired with cytosine.
Paired nucleotides are held together by hydrogen bonds.
The two strands of DNA each have phosphate-sugar backbones.
d

In the united states there are strict fishing seasons and limits, but not all countries enforce similar laws. in bangladesh there are few if any fishing restrictions. what might be the reason for less restrictions in smaller countries like bangladesh? a) the united states is the only country worried about overfishing. b) the united states wants to limit the supply of fish to increase the price. c) bangladesh and smaller countries have an unlimited supply of fish in their coastal waters. d) small countries, such as bangladesh, are practicing subsistence fishing, taking only the fish needed to survive.