B. Mitochondrion is responsible for cellular respiration
Answer:
Im not sure how to circle but the three components should be circled...
Explanation:
There are 8 nucleotides in this picture.
A nucleotide consists of a phosphate group (the blue circle), a pentose sugar (the blue pentagon), and a nitrogenous base (the red, green, purple, and yellow hexagons). One nucleotide would only have one of the nitrogenous bases.
C: oxygen
Step by step:
Let me get Brainly:)
Yeah it is because it helps it live longer then planned