Biology- Plant nutrition
0.0 / 5
- Created by: Kitsune
- Created on: 28-01-17 14:56
Define photosynthesis
The process by which plants manufacture carbohydrates from raw materials using energy from light
1 of 41
State the balanced equation for photosynthesis
6CO2 + 6H2O = C6H12O6 + 6O2 (in presence of light and oxygen)
2 of 41
Why is chlorophyll required?
It transfers light energy into chemical energy in molecules for the synthesis of carbohydrates
3 of 41
What do chloroplasts act as?
Energy transducers
4 of 41
What is chlorophyll?
A light absorbing pigment which acts as a catalyst in photosynthesis
5 of 41
What is starch?
A storage form of glucose in plants
6 of 41
In what form do plants absorb minerals?
As ions
7 of 41
How are minerals added to soil?
By decomposition of dead living organisms, by breakdown of rock, or by farmers as fertilizers
8 of 41
How are minerals removed from soil?
By plants, by leaching
9 of 41
Name natural fertilizers.
Sewage sludge, compost
10 of 41
Why do plants need magnesium ions?
They form part of the chlorophyll molecule
11 of 41
What does deficiency of magnesium lead to?
Chlorosis- leaves turn yellow
12 of 41
Why do plants need nitrate ions?
For the manufacture of amino acids
13 of 41
What does nitrate ion deficiency cause?
Stunted growth
14 of 41
What does a plant need to photosynthesize efficiently?
A method for exchange of gases, light absorbing organs, a way of delivering water to the leaf, a system for the removal of glucose
15 of 41
What does the waxy cuticle do?
Reduces water loss from leaf surface
16 of 41
Describe the waxy cuticle
It is transparent, thicker on the upper leaf surface since it is more exposed to the sun
17 of 41
What does the upper epidermis do?
Prevents the entry of disease causing organism
18 of 41
Describe the upper epidermis.
It is one cell thick. It is transparent and cells don't have chloroplasts so light can easily penetrate
19 of 41
Describe the palisade mesophyll cells
They are packed tightly together and are filled with chloroplasts
20 of 41
What is the function of palisade mesophyll cells?
They are the best site of photosynthesis
21 of 41
Describe spongy mesophyll cells.
They are loosely packed and don't have many chloroplasts
22 of 41
What do the spongy mesophyll cells allow?
Large spaces between the cells allow easy diffusion of water and carbon dioxide to the palisade mesophyll cells.
23 of 41
What makes up the vascular bundle?
Xylem and phloem
24 of 41
What does xylem transport?
Water and minerals
25 of 41
What does the phloem transport?
Sucrose
26 of 41
What are stomata?
Pores that allow entry of CO2 and exit of O2
27 of 41
Where are most stomata present?
On the lower leaf surface
28 of 41
Why are stomata cells open when there is plenty of water?
Guard cells become turgid and the outer surface stretches, making the cells curve away from each other
29 of 41
What does the thin layer of water of chloroplasts does?
Dissolve CO2
30 of 41
How can chloroplasts make the best use of light
They can move within the cell
31 of 41
Why doesn't the amount of water affect photosynthesis?
The plant will die of dehydration before it runs out of water for photosynthesis
32 of 41
What is a limiting factor?
Something present in the environment in such short supply that it restricts life processes
33 of 41
Why is low temperature a limiting factor for photosynthesis?
Enzymes work too slowly
34 of 41
What do greenhouses do?
They maximize the rate of photosynthesis by minimizing the limiting factors
35 of 41
Name three ways in which greenhouses minimize limiting factors.
1. CO2 enrichment by burning propane (2% conc.) 2. Increasing light intensity 3. Sustaining a suitable temperature.
36 of 41
How can a change in CO2 levels be demonstrated?
Using a hydrogen carbonate indicator
37 of 41
Wha do you call the point at which rates of photosynthesis and respiration are equal?
Compensation point
38 of 41
What color in hydrogen carbonate when neutral?
Pink
39 of 41
What color in hydrogen carbonate when more acidic?
yellow
40 of 41
What color in hydrogen carbonate when less acidic?
purple
41 of 41
Other cards in this set
Card 2
Front
State the balanced equation for photosynthesis
Back
6CO2 + 6H2O = C6H12O6 + 6O2 (in presence of light and oxygen)
Card 3
Front
Why is chlorophyll required?
Back
Card 4
Front
What do chloroplasts act as?
Back
Card 5
Front
What is chlorophyll?
Back
Related discussions on The Student Room
- Exam help gcse bio edexcel »
- Uni courses »
- Edexcel IGCSE Biology | PAPER 2 »
- Is plant milk better than cow milk? »
- Test revision notes gcse edexcel higher biology »
- WJEC AS Biology Unit 2 »
- Eduqas A-Level Biology Component 3 [21st June 2023] Exam Chat »
- a level choices »
- University - recipe suggestions for students »
- Edexcel IGCSE Biology 9-1 | PAPER 1 »
Similar Biology resources:
5.0 / 5 based on 1 rating
0.0 / 5
0.0 / 5
4.0 / 5 based on 1 rating
0.0 / 5
4.5 / 5 based on 2 ratings
0.0 / 5
0.0 / 5
3.5 / 5 based on 2 ratings
4.0 / 5 based on 7 ratings
Comments
No comments have yet been made