Why plants that consume more than usual 18 ATP to produce 1 molecule of glucose are favoured in tropical regions?

Explanation

### Step-by-Step Solution

1. **Understanding ATP Requirement for Glucose Production**:
- The standard requirement for producing one molecule of glucose through photosynthesis is 18 ATP and 12 NADPH. This occurs during the Calvin cycle.

2. **Increased ATP Consumption in Tropical Plants**:
- In tropical regions, certain plants, particularly C4 plants, are known to use more than the usual 18 ATP, often around 30 ATP, to produce one molecule of glucose.

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