Which best describes the role of nitrogen-fixing bacteria in the flow of energy?

Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes

If the dimensions of a cube-shaped cell with a length,height, and width of 1 micrometer were to double, what would be the cell's new ratio of surface area to volume? a.3 to 1 b.4 to 3 c.1 to 2 d1 to 6

Which of the following is the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin