The central atom in an amino acid that all the groups connect to is a O A. Hydrogen
.
O B. Oxygen
• O C. Carbon
.
O D. Nitrogen

C. Carbon

Explanation:

The central atom in an amino acid that all the groups connect to is a carbon atom.

Amino acids are monomeric units of proteins. They are bifunctional in that they have an amino group and a carboxyl group. These groups are attached to a carbon atom, α-carbon, in a molecule.

This is common to all amino-acids.

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)