Question 23
Question 23 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
7. Transport in plants
7.2. Transport mechanisms

explain how companion cells transfer assimilates to phloem sieve tubes, with reference to proton pumps and cotransporter proteins

7. Transport in plants
7.1. Structure of transport tissues

draw and label xylem vessel elements, phloem sieve tube elements and companion cells from microscope slides, photomicrographs and electron micrographs