Why Is Photorespiration More of a Problem for a Plant

question 67

Multiple Choice

Why is photorespiration more of a problem for a plant when their stomata are closed?

• A) Oxygen cannot enter the leaf, blocking normal respiration, so the plants switch to photorespiration.
• B) Oxygen, from water in photosystem I, can't leave the leaf, and competes with carbon dioxide for rubisco's active site.
• C) Water is lost when the stomata are open, and is not available to accept electrons from Photosystem I.
• D) Carbon dioxide levels increase from the light reactions, and compete with oxygen for rubisco's active site.

---

Definitions:

Written Contracts

Agreements that are put in writing and signed by the parties involved, thus providing a legal record.

Enforced

The act of compelling compliance or obedience to a law, rule, agreement, or obligation through legal or authoritative means.

Intended Beneficiary

A third party to a contract whom the contracting parties intended to benefit directly from their contact.

Prenuptial Agreement

A contract entered into prior to marriage specifying the distribution of assets in the event of divorce or death.