Biology 5 9B Plant growth

Question 1

What is the equation for photosynthesis?

Answer 1

Water + carbon dioxide (+ light energy) ➡️ glucose + oxygen.

Question 2

What are the reactants in the photosynthesis equation?

Answer 2

Water + carbon dioxide.

Question 3

What are the products in photosynthesis?

Answer 3

Glucose + oxygen.

Question 4

What are needed for photosynthesis to happen?

Answer 4

Light and chlorophyll.

Question 5

What happens to light during photosynthesis?

Answer 5

The light energy is changed into chemical energy which is stored in the glucose that is made.

Question 6

Root hair cells group together to form …

Answer 6

Root hair tissue.

Question 7

How do plants get water?

Answer 7

Water is taken out of the soil by the roots.

Question 8

How are roots specially adapted to take in a lot of water?

Answer 8

They branch and spread out to absorb water from a large volume of soil. Also, root hair cells have a large surface are to help absorb water quickly.

Question 9

Which plant cell prevents water loss from leaves?

Answer 9

Guard cell

Question 10

Which raw material is needed for photosynthesis that enters the leaf through the stomata?

Answer 10

Carbon dioxide.

Question 11

When does respiration happen in plants?

Answer 11

All the time.

Question 12

Are you more likely to find stomata on the upper or lower side of a leaf?

Answer 12

.lower

Question 13

In which part of the plant does photosynthesis happen?

Answer 13

Leaves

Question 14

Why do plants have roots?

Answer 14

To get water from the soil and for support.

Question 15

What are all the raw materials for photosynthesis?

Answer 15

Carbon dioxide and water

Question 16

Describe the movement of gases through stomata during photosynthesis.

Answer 16

Oxygen moving out of the leaf.

Carbon dioxide moving into the leaf.

Question 17

How is glucose carried around a plant?

Answer 17

Phloem tubes.

Question 18

In which plant cell does the most photosynthesis happen?

Answer 18

Palisade cell

Question 19

Where does the water flow up?

Answer 19

The xylem tubes.

Question 20

What are the xylem tubes made of?

Answer 20

Hollow cells.

Question 21

Why is water needed?

Answer 21

To keep the plant hydrated.
Mineral salts. - these keep plants healthy.
Stops plants from wilting.
Keeps leaves cool.

Question 22

What does the carbon dioxide do.

Answer 22

Diffuses into the cells using the stomata which are small holes

Question 23

Why are the leaves thin?

Answer 23

So the carbon dioxide does not need to go very far before reaching the cells that need it.

Question 24

When can photosynthesis be sped up?

Answer 24

If the amount of carbon dioxide around the plant is increased.
If there is more light.

Question 25

How do leaves trap as much sunlight as possible?

Answer 25

They are wide and have a large surface area.

Question 26

Where are palisade cells?

Answer 26

In the upper surface of leaves.

Question 27

Where does most photosynthesis occur?

Answer 27

In the palisade cells.

Question 28

What are palisade cells packed with?

Answer 28

Chloroplasts.

Question 29

Why are chloroplasts needed for photosynthesis?

Answer 29

They contain chlorophyll which absorbs light energy.

Question 30

How do plant cells release energy that is stored in glucose?

Answer 30

Aerobic respiration.

Question 31

What is the word equation for aerobic respiration?

Answer 31

Glucose + oxygen ➡️ carbon dioxide + water (+ energy)

Question 32

Why do all living this gd need energy?

Answer 32

So they can respire

Question 33

When do photosynthesis and respiration happen?

Answer 33

Respiration happens all the time.

Photosynthesis only happens when there is light.

Question 34

What is glucose?

Answer 34

A type of sugar

Question 35

What is glucose used for?

Answer 35

Respiration
Making other substances that act as stores of energy ( eg starch)
Making new materials for growth.

Question 36

What is glucose turned into?

Answer 36

Cellulose (this is used for cell walls), fats and proteins.

Question 37

How do plants make proteins?

Answer 37

Mineral salts called nitrate are needed.

Question 38

What do phloem tubes carry?

Answer 38

New substances in a plant.

Question 39

What do new substances in a plant do?

Answer 39

Help to build up a plants biomass.

This is the mass of all the materials in the plants except from water.

Question 40

How do plants store the food they make?

Answer 40

In the glucose

Question 41

How do plants store the food they make?

Answer 41

In the glucose

Question 42

In which weather conditions would the guard cells close the stomata to prevents water loss?

Answer 42

Dry and windy

Question 43

Which plant cell prevents leaf water loss?

Answer 43

Guard cell

Question 44

What is photosynthesis ?

Answer 44

A chemical reaction so it has an equation.