Amino acids can be distinguished from one another by a) the number of r groups found on the amino acid molecules. b) the chemical properties of their r groups. c) the type of bond between the r group and the rest of the amino acid molecule. d) the chemical properties of their amino and carboxyl groups. e) the number of alpha carbons present in the amino acid molecules

The answer to your question is: letter B

Explanation:

A) the number of R groups found on the amino acid molecules.  The number of groups R is not consider to distinguished amino acids, they only have 1 R group so this answer is incorrect.

B) the chemical properties of their R groups. This is the right answer because of the chemical properties of R groups them will be the kind of reactions an amino acid have.

C) the type of bond between the R group and the rest of the amino acid molecule. The type of bond is not important most of them have the same bonding. This answer is not correct

D) the chemical properties of their amino and carboxyl groups. All amino and carboxyl groups have the same properties. This answer is not right.

E) the number of alpha carbons present in the amino acid molecules. This is not important so this answer is not correct.

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)

c. is the correct answer