Practise identifying xylem and phloem, tracing soil-to-leaf water movement and analysing assimilate translocation alongside structural adaptations and transpiration data.
dicotyledonous leaf has a palisade mesophyll layer that is approximately twice as thick as the spongy mesophyll layer.
Which plan diagram is correct?
upper surface of leaf
upper surface
of leaf
upper surface
of leaf
The diagrams show transverse sections of parts of a plant. Transport tissues are labelled 1 to 6.
Which row shows tissues that mainly transport water and tissues that mainly transport sucrose?
mainly transport
water
mainly transport
sucrose
1 and 3
4 and 6
2 and 3
4 and 5
3 and 5
2 and 6
4 and 6
2 and 3
The plan diagram of a transverse section through a dicotyledonous plant stem was drawn by a student. They had stained the section with a chemical that stains lignin.
Which row is correct for tissues W and Z ?
W
Z
stained
tissue
phloem
xylem
W
phloem
xylem
Z
xylem
phloem
W
xylem
phloem
Z
Which statement correctly describes the movement of solutes in the symplast pathway?
Cell surface membranes regulate the selective absorption of solutes into the symplast pathway.
Plasmodesmata control the movement of solutes from the symplast pathway to the apoplast pathway.
The symplast pathway transports dissolved mineral ions from the soil that cannot be transported by the apoplast pathway.
The movement of solutes through plasmodesmata in the symplast pathway is prevented in the endodermis by suberin.