Plants

Question 1

Symbol equation for photosynthesis

Answer 1

6CO2 + 6H2O -> C6H12O6 + 6O2

Question 2

Definition of Photosynthesis

Answer 2

Photosynthesis is the process that produces ‘food’ in plants. The ‘food’ it produces is algae.

Question 3

3 limiting factors that affect the rate of photosynthesis

Answer 3

Intensity of light
Volume of CO2
Temperature

Question 4

What is the word equation for photosynthesis?

Answer 4

Carbon Dioxide + Water -> Glucose + Oxygen

Question 5

What happens to the enzyme if the temperature gets too hot?

Answer 5

The enzyme is denatured

Question 6

What are the 5 things glucose is used for in plants?

Answer 6

• Respiration
• Making cell walls
• Making proteins
• Stored as fats or oils
• Stored as starch

Question 7

How is the leaf adapted for gas exchange?

Answer 7

• It has stomata to let the Carbon Dioxide through
• Flattened shape increases the area of exchange surface so that it’s more effective
• Air spaces inside the leaf so more chance of carbon dioxide getting through

Question 8

What do the guard cells do?

Answer 8

The control how far the stomata is open/closed

Question 9

When do the guard cells close the stomata?

Answer 9

When the plant is losing water faster than it is being replaced by the roots. Without the guard cells would wilt

Question 10

When is evaporation quickest?

Answer 10

In hot, dry, windy conditions

Question 11

Where are the water and mineral ions aborted from?

Answer 11

By the roots

Question 12

What do the root hairs do?

Answer 12

They increase the surface area of the roots so minerals can be absorbed more quickly

Question 13

What is the phloem made form?

Answer 13

Columns of living cells with holes in the ends to let stuff through

Question 14

What does the Phloem transport?

Answer 14

Sugars

Question 15

What direction does transport in the phloem go?

Answer 15

Both directions

Question 16

What is the xylem made from?

Answer 16

Dead cells joined end to end walls between them and a hole down the middle

Question 17

What does the xylem transport?

Answer 17

Water and minerals

Question 18

What direction does transport in the xylem go?

Answer 18

Upwards - from the roots to the stem and leaves

Question 19

What is transpiration?

Answer 19

The loss of water from a plant

Question 20

What is transpiration caused by?

Answer 20

Evaporation and diffusion of water inside the leaf

Question 21

What is auxin?

Answer 21

Plant growth hormone

Question 22

Where does auxin control the growth?

Answer 22

Near the tips of shoots and roots

Question 23

What is phototropism?

Answer 23

Growth of a plant in response to light

Question 24

What is geotropism?

Answer 24

Growth of a plant in response to gravity

Question 25

What is hydrotropism?

Answer 25

Growth of a plant in response to water

Question 26

Where is auxin produced?

Answer 26

In the tips

Question 27

What is the male reproductive part in a plant?

Answer 27

Stamen

Question 28

What does the anther do?

Answer 28

Produces the male gametes

Question 29

What is the female reproductive part in a plant?

Answer 29

Carpel

Question 30

What does the stamen consist of?

Answer 30

Anther + Filament

Question 31

What is the filament?

Answer 31

The stalk that supports the anther

Question 32

Describe fertilisation

Answer 32

• anther produces male gametes in pollen grains
• pollen grain lands on stigma
• pollen tube grows out of pollen grain, down the style and the ovary and into the ovule
• nucleus moves down tube to ovary where it fertilises egg

Question 33

What is the ovary?

Answer 33

The place where the female gametes are contained inside ovules

Question 34

What is the style?

Answer 34

The rod-like section that supports the stigma

Question 35

What is the stigma?

Answer 35

Where the pollen grains attach to

Question 36

What does the carpel consist of?

Answer 36

Stigma, style, ovary