JAMB Biology 2009 Objective — Question 13

Question 13 of 50 from the Joint Admissions and Matriculation Board (JAMB) Biology 2009 Objective paper, with the correct answer and a full explanation.

Use the diagram below to answer questions 13 and 14 (leaf cross-section with I-IV labeled). The structure that controls loss of water vapour during transpiration is labeled

A. I
B. II
C. III
D. IVCorrect

Explanation

The guard cell (labeled as IV) controls the loss of water vapour. It does this by regulating the opening and closing of the stomata.

Sign up free to unlock

Score tracking
Practice history
Saved questions
Progress dashboard
Personalized sessions
Weak-topic breakdown

…and/or go further with premium services and No Ads.

Create free account

More questions from Biology 2009 Objective More Biology past papers