(Q).
Q: How long ago did the ancestors of mammals evolve? Choices: - 10 million - 50,900 million years - 100 million - 300 million years A:
(A).
300 million years

(Q).
Q: What uses oxygen gas to break apart the carbon-hydrogen bonds in glucose and release their energy? Choices: - electromagnetic respiration - classical respiration - energetic respiration - cellular respiration A:
(A).
cellular respiration

(Q).
Q: What flows across the membrane resulting in changes in the membrane potential? Choices: - electrons - acids - neutrons - ions A:
(A).
ions