Q: A constant and plentiful supply of oxygen is required in order to maintain a high rate of what?


Read this paragraph and choose the correct option from the provided answers:

Keeping the rate of metabolism high takes a constant and plentiful supply of oxygen. That’s because cellular respiration, which produces energy, requires oxygen. The lungs and heart of mammals are adapted to meet their oxygen needs.

 Choices:

- digestion

- cell division

- magnesium

- metabolism


A:
metabolism