Nutrition: Flowering plants

Question 1

During photosynthesis light energy is converted into…

Answer 1

Chemical energy

Question 2

Chemical equation for photosynthesis:

Answer 2

6CO2 + 6H20 —> C6H12O6 + 6O2

Question 3

Word equation for photosynthesis:

Answer 3

caarbon dioxide + water —> glucose + oxygen

Question 4

Three things that affect the rate of photosynthesis:

Answer 4

• light intensity
• CO2 concentration
• temperature

Question 5

Leaves are thin for…

Answer 5

Short diffusion distance

Question 6

Leaves have a large surface area for…

Answer 6

Maximum absorption of light

Question 7

Upper epidermis and cuticle are…

Answer 7

Transparent

Question 8

Lots of chloroplasts in the ________close to ______for ___________.

Answer 8

• paliside layer
• surface
• maximum absorption of light

Question 9

Air spaces in the spongey layer to help ______

Answer 9

diffusion

Question 10

Guard cell controls the opening and closing of the….

Answer 10

Stomata

Question 11

Water brought to leaf in…

Answer 11

Xylem vessels

Question 12

______ transports the _______ produced during photosynthesis.

Answer 12

• Pholem

- sugars

Question 13

Why is nitrate needed?

Answer 13

To make amino aacids and proteins

Question 14

Why is magnesium needed?

Answer 14

To make chlorophyll

Question 15

PRACTICAL: Why is the leaf placed in boiling water?

Answer 15

• make cell membrnes permeable
• denature enzymes
• kill leaf

Question 16

PRACTICAL: Why is the leaf placed in boiling ethanol?

Answer 16

To remove chlorophyll

Question 17

PRACTICAL: Why is the leaf placed in NORMAL water?

Answer 17

To hydrate leaf for iodine diffusion

Question 18

PRACTICAL: Why is iodine solution added to the leaf?

Answer 18

To test for the prescence of starch

Question 19

PRACTICAL: What does blue/black indicate?

Answer 19

Starch is present

Question 20

PRACTICAL: What does orange/yellow indicate?

Answer 20

No starch is present