Nutrition and transport in plants

Question 1

Leaf blade

Answer 1

Enables plant to obtain maximum amount of light for photosynthesis, carbon dioxide can diffuse in rapidly and is called the lamina

Question 2

Network of veins

Answer 2

contains the xylem (water and mineral salts) and the phloem (manufactured food)

Question 3

Leaf stalk

Answer 3

Holds the leaf blade away from the stem to obtain maximum amount of sunlight

Question 4

Guard cell

Answer 4

The guard cell controls the size of the stomata, it contains chloroplasts but epidermal cells do not and guard cells help regulate the passage of gasses between the leaf and the environment

Question 5

Opening of the stomata

Answer 5

Guard cell carries out photosynthesis and produces glucose, water potential decreases so water enters the guard cell, guard cell swells and becomes turgid, and they become curved and stomata opens

Question 6

What happens to the stomata when its too hot

Answer 6

The leaf losses too much water to the atmosphere, the guard cell becomes flaccid

Question 7

photosynthesis word equation

Answer 7

CO2 + 6H2O chlorophyll/sunlight→ C6H12O6 + 6O2.

Question 8

Chlorophyll

Answer 8

traps light and converts it to chemical energy for the formation of carbohydrates

Question 9

How the leaf takes in carbon dioxide

Answer 9

During daylight when photosynthesis occurs, the carbon dioxide in the leaf is rapidly used up. The carbon dioxide concentration in the leaf becomes lower than that in the atmospheric air, carbon dioxide from the surroundings diffuses through the stomata into the intercellular air spaces. Carbon dioxide dissolves in the thin film of moisture and diffuses into the the cell.