the bird is a barn swallow.
The mass of a tree is primarily carbon. The carbon comes from carbon dioxide used during photosynthesis. During photosynthesis, plants convert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water.
Answer:
DNA, it controls all cell activities
Explanation:
its the central part of the cell that contains dna and rna and is responsible for growth and reproduction
