transpiration

Question 1

what are the holes at the bottom of leaves called and what do they do?

Answer 1

stomata and they open and close to let gasses in and out

Question 2

what do guard cells do?

Answer 2

-open and close the stomata
-carbon dioxide from the air diffuses into the air spaces and into the cells and oxygen gas diffuses out

Question 3

what do plants lose through the stomata?

Answer 3

-gas
-water

Question 4

transpiration

Answer 4

evaporation of water vapour

Question 5

transpiration stream

Answer 5

the flow of water from the roots to the leaf in the xylem

Question 6

what factors affect transpiration?

Answer 6

• temperature
  -humidity
  -wind
  -light intensity

Question 7

what is transported through the xylem?

Answer 7

water and mineral ions

Question 8

describe the structure of the xylem

Answer 8

dead cells with no ends form a continuous empty tube that is strengthened by lignin

Question 9

which direction are substances transported through the xylem?

Answer 9

up the stem

Question 10

name the transportation proccess in the xylem

Answer 10

transpiration

Question 11

what is transported through the phloem?

Answer 11

cell sap - sugar solution

Question 12

describe the structure of the phloem

Answer 12

phloem cells joined together to form phloem tubes with sieve plates between them

Question 13

which direction are substances transported through the phloem?

Answer 13

up or down

Question 14

name the transportation proccess in the phloem

Answer 14

translocation