UNIT 7-TRANSPORT IN PLANTS🤎

Question 1

define the vascular system (for understanding), state the role of the vascular system

Question 2

draw and label all parts of transverse sections of a leaf, root and stem (make sure to include the xylem and phloem in the labels)

Question 3

briefly state the use of other components of vascular tissue apart from the xylem and phloem (parenchyma, sclerenchyma, collenchyma) (not on syllabus)

Question 4

explain the process of transpiration of water in a plant, draw a diagram if necessary

Question 5

explain IN DETAIL how water moves during transpiration: from the xylem across the leaf and through the xylem from the root to the leaf (use the concepts of cohesion and adhesion in your explanation)

Question 6

explain what pits are and give their use in the transport of water

Question 7

relate the structure of the xylem to it’s function in the transport of water

Question 8

explain several adaptations of xerophytic plants that helps them to reduce water loss by transpiration, include a diagram of a TS of a rolled marram grass leaf in your explanation

Answer 8

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Question 9

describe IN DETAIL the movement of water from the root hairs to the xylem, refer to the two pathways in your explanation and the necessary components of the pathways

Question 10

explain the movement of water from the soil into root hairs

Question 11

relate the structure of xylem vessel elements and companion cells to their functions

Question 12

what are assimilates? give a few examples, state how assimilates are transported

Question 13

define sources and sinks, explain mass flow in phloem sieve tubes down a hydrostatic pressure gradient from source to sink (use a diagram if necessary)

Question 14

relate the structure of the phloem to it’s function

Question 15

explain how companion cells transfer assimilates to phloem sieve tubes (refer to the necessary transport proteins)