First step the biologist needs to make an observation in which to create a hypothesis.
Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. ... Green plants and trees use photosynthesis to make food from sunlight, carbon dioxide and water in the atmosphere: It is their primary source of energy.
<span>A) Phosphate groups, ribose sugar, adenine base</span>
Answer:
B sister chromatids
Explanation:
the haploid number of still duplicated chromosomes align at the metaphase plate. sister chromatids separate, becoming daughter chromosomes that move to the poles.