Plant systems

Question 1 of 10

Lenticels on woody stems allow

Question 2 of 10

Xylem vessels are dead and lignified, which allows them to

Question 3 of 10

Water and minerals move up a plant through the

Question 4 of 10

The movement of sugars through the phloem is

Question 5 of 10

Gases enter and leave a leaf mainly through the

Question 6 of 10

The tissue that increases the girth of a stem is the

Question 7 of 10

A plant grows towards light because of

Question 8 of 10

The products of the light stage of photosynthesis are

Question 9 of 10

Food made in the leaves is transported to other parts by the

Question 10 of 10

Stomata usually close at night because