transportation in plant

Question 1

cortex

Answer 1

region between the vascular bundle

Question 2

xylem function

Answer 2

to transport water and mineral ion from roots into stem and leaves
to provide mechanical support

Question 3

structure of xylem

Answer 3

has an empty lumen without protoplasm and cross wall
thickened with lignin

Question 4

phloem

Answer 4

transport sucrose and amino acid from leaves to rest part of plant

Question 5

structure of phloem

Answer 5

companion cell- to give energy
sieve tubes- to allow rapid flow

Question 6

translocation

Answer 6

movement of sucrose and amino acids in phloem from sink to source

Question 7

3 movement of water

Answer 7

root pressure capillary action transpiration pull

Question 8

root pressure

Answer 8

force exerted by roots to push water up xylem

Question 9

capillary action

Answer 9

movement of water upwards in stem throgh xylem with help of adhesion force and cohesion force
adhesion force-between xylem wall and water
cohesion force- between water molecules

Question 10

transpiration pull

Answer 10

water is drawn up to leaf to replace water loss

Question 11

transpiration

Answer 11

loss of water vapour from the leaves throgh stomata by the evaporation of water at the surface of mesophyll cell

Question 12

factors affecting transpiration

Answer 12

humidity temperature light and wind

Question 13

humidity(transpiration

Answer 13

high humidity low transpiration
low humidity high transpiration

Question 14

temperature(transpiration)

Answer 14

high temp high kinetic energy - high transpiration

Question 15

wind(transpiration)

Answer 15

high wind high transpiration

Question 16

light(transpiration)

Answer 16

high light high transpiration
low light low transpiration

Question 17

importance of transpiration

Answer 17

cooling effect and allow continuous flow of water and mineral ion

Question 18

wilting

Answer 18

transpiration more then rate absorption of water usually during hot and dry day /water is not watered

Question 19

disadvantages of wilting

Answer 19

decrease photosynthesis