Answer:
The most likely preferable option will be - A.
A. Insects.
Explanation:
The basic features of insects -
- Insects have an exoskeleton outside of their body or a shell-like covering on the outside of its body.
- Insects have a body with three segments: head, thorax, and abdomen.
- Insects have two large eyes and a pair of antennae on top of their heads.
- Insects have six legs (3 pairs).
- Insects have two pairs of wings on the dorsal part of their body.
Hello!
There are two possible answers to this. The one I'm assuming you're looking for is hydrogen bonds.
Hydrogen bonds are the bonds which hold together the double helix shape of DNA. These bonds result from a positive and negative charge drawing two molecules closer to each other. These bonds are generally seen as weak, however, since there are so many of these bonds (as there are so many nitrogenous bases in one strand of DNA), the double helix strand is fairly strong.
Hope this helps!
Answer:
there were only anaerobic heterotrophic bacteria (the primordial atmosphere was virtually oxygen-free).
