Nutrition and flowering plants (part II)

Question 1

What are the factors that affect the rate of photosynthesis?

Answer 1

CO2
LIGHT INTENSITY
TEMPERATURE

Question 2

How does light intensity affect the rate of diffusion?

Answer 2

More light intensity = rate of photosynthesiss increases.
- Because energy provided is more, therefore rate of reaction will increase.

Low light intensity = rate of photosynthesis decreases.
- Because energy that prpvides is less, therefore reaction is decreased.

Question 3

How does CO2 affect the rate of photosynthesis?

Answer 3

Insufficient CO2 = rate of phoosynthesis will decrease.
- Because there is LESS REACTANT therefore less reaction.

Lots of CO2 = rate of phtosynthesis will increase.
- Because there is LOTS OF REACTANT therefore rate of photosynthesis will be much higher.

Question 4

How does temperature affect the rate of photosynthesis?

Answer 4

COLD TEMPERATURES = rate of photosynthesis decreases.
- Because energy that light provides is less, therefore reaction is decreased.

HOT CONDITIONS = rate increases
- Because molecules have more energy.

Question 5

Why isn´t glucose a waste product for photosynthesis?

Answer 5

CO2 + H2O –> C6H12O6 + 6O2
carbon dioxide + water –> glucose + oxygen

• PLANTS USE GLUCOSE IN RESPIRATION but not oxygen therefore oxygen is a waste product.

Question 6

What happens to plants during respiration?

Answer 6

They use O2 and produce CO2 (O2 useful and CO2 is a waste product)
- gasses diffuse via stomata when they open (during daytime/light/ when photosynthesis is occuring).

Question 7

Why do plants need mineral ions ?

Answer 7

Plants require mineral ions for growth.

Question 8

What ions are needed for chlorophyll?

Answer 8

Magnesium ions - needed to build chlorophyll for growth.

- deficiency: leaves turn yellow

Question 9

What ions are needed for amino acids?

Answer 9

Nitrate ions - needed to produce amino acids to build PROTEIN + DNA.
- deficiency: leaves turn yellow + causes stunted growth.