A DNA molecule is shown in the diagram below.

What part of the DNA molecule is represented by the structure labeled 1?

A. an amino acid
B. a nucleotide
C. a nitrogen base
D. a phosphate

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.

Does solar energy ever run out? brainliest

Which of the following is the smallest unit that would contain a complete copy of the entire human genome? a) one human somatic cell b) one human chromosome c) all of the dna of one human d) one human gene