Which step happens first to a chromosome during cell division?
A. Nucleotides are added to each half of a DNA molecule.
B. A DNA molecule unwinds, exposing the bases on each half.
C. Each half of a DNA molecule acts as a template.
D. Two identical DNA molecules form.

What does the chemical formula c3h6o2 tell about a molecule of the compound it represents

Microorganisms aren’t all decomposers; in fact, many act as producers or primary consumers in an ecosystem. how do microorganisms that act as producers benefit the rest of an ecosystem in terms of energy transfer? what about microorganisms that act as primary consumers?

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones