STRUCTURE AND DISTRIBUTION OF VASCULAR TISSUE

Question 1

Draw the vascular tissue of a root cell and advantage

Answer 1

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- resists vertical stress, and anchors plant in soil

Question 2

Draw the vascular tissue of a stem cell and advantage

Answer 2

image

- provides flexible support and resists bending

Question 3

Draw the vascular tissue of a leaf cell and advantage

Answer 3

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- gives flexible strength and resistance to tearing

Question 4

main cell types in the xylem

Answer 4

• vessels

- tracheids

Question 5

tracheids (2)

Answer 5

• occur in angiosperms, ferns, conifers

- grow taller than mosses

Question 6

vessels (4)

Answer 6

• occur only in agiosperms
• lignin builds up in cell walls and then dies leaving an empty lumen
• as tissue develops end walls of the cell break down, leaving long hollow tube for water to climb through
• stains red, so easy to identify

Question 7

functions of the xylem

Answer 7

• transport of water & dissolved minerals

- providing mechanical strength and support