C4 Photosynthesis

question 18

Multiple Choice

C4 photosynthesis

• A) is advantageous because RUBP carboxylase has a high affinity for CO₂.
• B) is advantageous because PEP carboxylase has a high affinity for CO₂.
• C) the stomata can remain open during the day.
• D) evolved just once.
• E) none of the above

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Definitions:

Maxillary Sinuses

Air-filled spaces located within the cheekbones and under the eyes that are part of the sinus system.

Ethmoid Sinuses

Air-filled spaces located between the nose and the eyes that are part of the paranasal sinus system.

Turbinates

Long, narrow bones covered in soft tissue within the nasal cavity that help warm, moisten, and filter the air we breathe.

Kiesselbach Plexus

A network of blood vessels located in the anterior part of the nasal septum, a common site of nosebleeds.