Question

Statement I: C3 weeds such as Avena fatua, Phalaris minor and Chenopodium album are generally more competitive than C4 weeds especially at higher temperature conditions.
Statement II: In C4 weeds photosynthesis occurs via the Calvin-Benson Cycle and the first stable product is phosphoglyceric acid.
In light of the above statements, choose the correct answer from the options given below:

• A. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Statement I is false but Statement II is true

Hint:

C4 pathway: first stable product is OAA.
C3 pathway: first stable product is PGA.
C4 weeds are more competitive at higher temperatures.

Answer 1

The Correct Option is C