How many nucleotides make up one strand of dna in human cells

4 nucleotides.

Explanation:

Basic building block of DNA is known as nucleotides, and they are composed of one phosphate molecule, a sugar, and four bases (guanine, adenine, cytosine, and thymine).

Purine bases is adenine and guanine they contain double ring structure, and pyrimidine bases is cytosine, and thymine they contain single ring structure. The nucleotide bases of DNA line up together, so that the phosphate, and sugar molecule make two long backbones, and each strands of DNA.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

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)