What are the three groups of atoms that make up amino acids called

H, -NH2 and -COOH groups

Explanation:

Lets take the example of simplest amino acid i-e Glycine

It has four functional groups:

1- H-atom

2- -NH2 amino group

3- -COOH carboylic group

4 -R group

Every amino acids have same H ,-NH2 and -COOH groups. The difference is in -R groups.

just go with your heart buddy

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.