Transpiration And Translocation

Question 1

What do phloem tubes do and what is their structure

Answer 1

Transport dissolved sugars
Made up columns of elongated living cells with small holes in the end walls to allow cell sap to flow
They transfer food substances made in the leaves to the rest of the plant

Question 2

What is translocation

Answer 2

Transport goes in both directions

Question 3

What do xylem tubes do and what are they made of

Answer 3

Take water up
Made of dead cells joined end to end with no end walls between them and a hole in the middle
They carry water and mineral ions from the roots to the stems

Question 4

What strengthens the xylem tube

Answer 4

Lignin

Question 5

What is transpiration

Answer 5

Movement of water from the roots though the xylem and out of the leaves

Question 6

What is the loss from the plant during transpiration

Answer 6

Water

Question 7

What is transpiration caused by

Answer 7

Evaporation and diffusion of water from a plants surface

Question 8

What does evaporation create in the leaf

Answer 8

A shortage of water in the leaf, so more water is drawn up from the rest of the plant through the xylem vessels to replace it- constant transpiration

Question 9

What is transpiration a side effect of and why

Answer 9

Side effect of leaves adaptation for photosynthesis
They have to have stomata in them so that gases can diffuse in and out
Because there’s more water inside the plant than outside the plant, water escapes from the leaves through the stomata by diffusion