Why Do Leaves Have Internal Air Spaces

question 38

Multiple Choice

Why do leaves have internal air spaces?

• A)to allow all the mesophyll cells to evaporate water and thus pull nutrients to them via an evaporatively driven flow
• B)because CO₂ diffusion is 10,000 times faster in air than in water
• C)to make leaves lighter and less dense
• D)because O₂ diffusion is 10,000 times faster in air than in water

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Definitions:

Periodic Inventory System

A method of inventory valuation in which updates to inventory levels and cost of goods sold are made periodically, such as at the end of the fiscal year.

Gross Method

An accounting approach for recording purchases at the invoice’s gross amount without deducting any cash discounts for early payment.

Merchandise

Goods bought and sold in the course of business operations.

Periodic Inventory System

An accounting system that records inventory purchases during the accounting period but waits until the end of the period to adjust the inventory balances and record cost of goods sold.