iGCSE Plant nutrition

Question 1

Water and mineral ions are supplied to the leaf by..

Accepted Answer

The xylem

Question 2

What is the purpose of the boiling water in the testing leaves for starch practical?

Accepted Answer

Stop chemical reactions and destroy membranes

Question 3

The function of the guard cells is to...

Accepted Answer

Open or close the stomata

Question 4

Elodea are an aquatic plant that are used to show that...

Accepted Answer

Oxygen is produced

Question 5

In the bell jar demonstration, what is the purpose of the soda lime?

Accepted Answer

Absorb carbon dioxide

Question 6

Which of these is glucose not used for in the plant?

Accepted Answer

Lactose

Question 7

What is the purpose of the cold water in the testing leaves for starch practical?

Accepted Answer

Softens and rehydrates the leaf

Question 8

Nitrates in plants are used for?

Accepted Answer

Making amino acids, proteins, chlorophyll and DNA

Question 9

What is the reagent we use to test for starch?

Accepted Answer

Iodine

Question 10

Which is a reactant in photosynthesis?

Accepted Answer

Water

Question 11

The cells containing chloroplasts are found in....

Accepted Answer

Palisade layer

Question 12

What effect does increasing light have on photosynthesis?

Accepted Answer

Increases it to a maximum

Question 13

Which is another reactant in photosynthesis?

Accepted Answer

Carbon dioxide

Question 14

What number do we add to balance the photosynthesis equation and how many times?

Accepted Answer

6,3

Question 15

The stomata are found in....

Accepted Answer

The Lower epidermis

Question 16

The function of the cuticle is to....act as a barrier to microorganisms and...

Accepted Answer

Prevent water loss by evaporation

Questions 16