plant structures and their function

Question 1

phototropism

Answer 1

grows towards light

Question 2

geotropism

Answer 2

grows towards gravity

Question 3

ethene

Answer 3

ripe

Question 4

gibberellins

Answer 4

growth

Question 5

auxins

Answer 5

growth towards lights

Question 6

what does the phloem do and how

Answer 6

transports ions through sieve elements

Question 7

which direction does the phloem go

Answer 7

downwards from leaves to roots

Question 8

what does the xylem do

Answer 8

carries water

Question 9

which direction does the xylem travel in

Answer 9

upwards direction from roots to leaves

Question 10

if transpiration is effected by light what happens

Answer 10

more transpiration as their is more photosynthesis

Question 11

if transpiration is effected by high temp what happens

Answer 11

more transpiration as rate of reaction is faster

Question 12

if transpiration is effected by high winds what happens

Answer 12

more transpiration as wind is moving things creating diffusion

Question 13

if transpiration is effected by high humidity what happens

Answer 13

lower transpiration as water struggles to leave

Question 14

what are stomata protected by

Answer 14

guard cells

Question 15

what is photosynthesis equation

Answer 15

carbon dioxide + water -> glucose + oxygen

Question 16

photosynthesis symbol equ + balance

Answer 16

CO2 + H2O -> O2 + C6H12O6

balanced
6CO2 + 6H2O -> 2O2 + C6H12O6

Question 17

what type of reaction is photosynthesis

Answer 17

endothermic

Question 18

what is a limiting factor

Answer 18

A factor which is not at an optimum level to enable maximum rate
of photosynthesis e.g. temperature

Question 19

how is CO2 a limiting factor

Answer 19

rate increases with it however then other factors limit it
e.g. water, light, temp all need to be increased then

Question 20

how is temp a limiting factor

Answer 20

rate increases with temp, it hits its optimum temp then enzymes active sites denature so no more photosynthesis can happen

Question 21

how is light intensity a limiting factor (2)

Answer 21

depends on day light

rate increases with light intensity, hits a point where other factors have to be increased
e.g. CO2, water or temp

Question 22

where is glucose stored

Answer 22

starch ( potatoes)

Question 23

what is the light intensity equ

Answer 23

1/d2 (distance squared)

Question 24

structure of the stomata

Answer 24

A stoma is a pore, found in the leaf and stem epidermis

Question 25

function of the stomata

Answer 25

used for gas exchange

Question 26

translocation

Answer 26

the movement of materials from leaves to other tissues throughout the plant.

Question 27

what is transported by translocation

Answer 27

sucrose

Question 28

how is sucrose transported by translocation

Answer 28

around the plant in phloem vessels

Question 29

endothermic reaction + e.g.

Answer 29

chemical reactions in which the reactants absorb heat energy from the surroundings to form products.

e.g. photosynthesis

Question 30

exothermic reaction + e.g.

Answer 30

chemical reactions which release energy from the chemicals into the surroundings.

e.g. respiration

Question 31

description of core practical

Answer 31

This experiment uses microscopic green algae trapped inside balls of jelly to investigate
photosynthesis.

The “algal balls” are placed in a hydrogen carbonate indicator solution.

As the algae photosynthesise they remove CO2 from the solution changing the pH.

This changes the colour of the indicator.