Why is anaerobic respiration less efficient?

Explanation

**Step-by-Step Solution:**

1. **Definition of Anaerobic Respiration**: Anaerobic respiration is a type of respiration that occurs in the absence of oxygen. It is a process where organisms convert glucose into energy without using oxygen.

**Hint**: Remember that anaerobic means "without oxygen."

2. **Incomplete Breakdown of Glucose**: During anaerobic respiration, glucose is not fully broken down. This incomplete breakdown results in the production of byproducts, such as lactic acid in animals or ethanol and carbon dioxide in yeast.

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