plant nutrition

Question 1

what is photosynthesis

Answer 1

process in which plants use light energy from sun absorbed by chlorophyll is used to convert co2 and water into glucose and oxygen

Question 2

what is the word equation for photosynthesis

Answer 2

carbon dioxide + water –> glucose + oxygen

Question 3

what the the chemical equation for photosynthesis

Answer 3

6Co2 +6h2o –> C6H12O6 + 6O2

Question 4

describe what happens during photosynthesis

Answer 4

light energy is absorbed by chloroplast
light energy is used to spilt water molecules
hydrogen and carbon dioxide bond to form glucose
oxygen gas is released

Question 5

what is inorganic and organic material

Answer 5

inorganic material are things like carbon, oxygen etc, they are used to make organic material such as lipid or carbohydrates

Question 6

which one does human gain nutrition from: inorganic or organic material

Answer 6

organic

Question 7

how does plant get their nutrient

Answer 7

they take in inorganic material

light energy convert materials to chemical energy producing organic materials

Question 8

where does photosynthesis happen?

Answer 8

inside leaf, in chloroplast

Question 9

what are the catalyst in leaves

Answer 9

chlorophyll pigments and enzyme in chloroplast

Question 10

learn to label leaf and the structure of leaf cell

Answer 10

lamina/blade, midrib, apex, midtrip and petiole

waxy cuticle, upper epidermis, palisade and spongey mesophyll, vascular bundle, lower epidermis, stomata

Question 11

what are the characteristics that help leaves to obtain carbon dioxide

Answer 11

broad and thin and flat lamina to increase surface area
help out by stem and petiole
stomata helps allow carbon dioxide to enter
airspace for co2 to diffuse to reach mesophyll cell

Question 12

what are the characteristic that help leaves obtain water

Answer 12

they have xylem vessel to transport water from root to leave

Question 13

what are the adaptation of a plant that allows them to obtain sunlight

Answer 13

mosaic arrangement: ensure no sunlight gets cut out from leaves
flat and broad surface
epidermis is thin and has no chloroplast
large number of chloroplast in mesophyll

Question 14

what is the features and adaptations of a cuticle

Answer 14

waxy layer

avoid water loss

Question 15

what is the features and adaptations of upper epidermis

Answer 15

one cell thick

transparent which allows sunlight to pass

Question 16

what is the features and adaptations of palisade mesophyll

Answer 16

tall thin and tightly packed, a lot of chloroplast and film of water vapour outside cell
co2 dissolves in film of water before diffusion

Question 17

what is the features and adaptations of spongey mesophyll

Answer 17

irregular shape increases internal surface area for gas exchange
loosely arrange and has a film of water vapour
more air space to allow diffusion of gases through leaf

Question 18

what is the features and adaptations of vascular bundle

Answer 18

xylem and phloem

xylem transport water and mineral salts to leaf and phloem transport products of photosynthesis away from leaf

Question 19

what is the features and adaptations of lower epidermis

Answer 19

guard cell and stomata, no chloroplast

guard cells open and close stomata which allows exchange of gas

Question 20

what happens to plants in terms of photosynthesis and respiration during the day and night

Answer 20

at day, the rate of photosynthesis is more than rate or respiration. so co2 is removed and oxygen is added to atmosphere
at night, respiration is hgiher than photosynthesis- so co2 is added and oxygen is removed

Question 21

what do the plants use the extra glucose made when photosynthesis is higher than rate of using nutrients

Answer 21

growth

Question 22

what do plants use glucose for

Answer 22

change into sucrose to be transported 
respiration to produce energy 
change into starch to be stored 
change into cellulose for cell wall 
change into amino acid for growth and tissue repair 
convert to oils to be stored in seeds

Question 23

what are the factors that affect rate of photosynthesis

Answer 23

temperature, water, carbon dioxide and availability of light

Question 24

how does carbon dioxide affect the rate of photosynthesis

Answer 24

the higher the concentration of carbon dioxide, the higher the rate of photosynthesis

Question 25

how does temperature affect rate of photosynthesis

Answer 25

the higher the temp, the higher the rate

affects rate of enzyme activity

Question 26

how does the availability of light affect photosynthesis

Answer 26

the higher the availability, the higher the rate

light produces energy for photosynthesis of water

Question 27

what does the absorbance of light depend on

Answer 27

light intensity, wavelength of light, time light is available and presence of chloroplast

Question 28

why does a lack of water cause a slower rate of photosynthesis

Answer 28

shortage will close stomata which limits co2 intake

Question 29

what is a limiting factor

Answer 29

factors that limits process from achieving it’s max possible rate

Question 30

how do you overcome limiting factors for photosynthesis

Answer 30

greenhouse
gas generator- burns coal/oil to make co2
artificial lighting- control intensity 
heating system 
windows to release hot air
timer to water on time

Question 31

how is minerals absorbed by plants

Answer 31

active transport

Question 32

what minerals are absorbed/ needed by plants and what are they used for

Answer 32

nitrate- to make amino acid for protein
magnesium - make chlorophyll
phosphate- involves in making DNA and respiration

Question 33

describe what will happen to the plant where there is a lack of

a. nitrate
b. magnesium
c. phosphate

Answer 33

nitrate- stunted growth, pale leaves at top yellow at lower stem
magnesium- yellow leaves
phosphate- poor root growth and purple leaves