Question

the second phase of cellular respiration requires energy and converts pyruvic acid into carbon dioxide. what do we call this phase? krebs cycle glycolysis

Explanation:

To solve this, we recall the phases of cellular respiration. Glycolysis is the first phase (breaks down glucose into pyruvic acid). The Krebs Cycle (also called Citric Acid Cycle) is the second phase, which uses pyruvic acid, requires energy input in some steps, and produces carbon dioxide.

Answer:

A. Krebs Cycle