9.1 Transport Systems In Dicotyledonous Plants

Question 1

Cotyledons

Answer 1

Dicots make seeds that contain 2 cotyledons which are organs that act as food stores.

Question 2

Vascular system (dicot)

Answer 2

Series of transport vessels in the plant running through the stem, roots & leaves

Question 3

Vascular bundle

Answer 3

Group of transport tissues arranged together

Question 4

Xylem

Answer 4

Largely non living tissue with 2 main functions. Transport of eater and mineral ions & support.

Question 5

Tannin

Answer 5

Bitter chemical preventing herbivores from eating the plant

Question 6

Xylem fibre

Answer 6

Long cells with lignified secondary walls providing mechanical strength. Does not transport fibre

Question 7

Phloem

Answer 7

Living tissue transporting food in the form of organic solutes around the plant from the leaves. Supplies sugars and amino acids. Can go up and down the plant

Question 8

Sieve tube element

Answer 8

Main transporting vessel of the phloem. Long hollow cells. Not lignified.

Question 9

Companion cell

Answer 9

Closely linked to sieve tube elements through plasmodesmata. Maintain their nucleus and all organelles. Function as a life support system

Question 10

Plasmodesmata

Answer 10

Microscopic channels through the cellulose cell walls linking the cytoplasm of adjacent cells