Plant Biology Yr9

Question 1

What do plants need for germination

Answer 1

Oxygen
Warmth
Water

Question 2

What does germination involve

Answer 2

Breaking open if the seed coat and the development of structures that will eventually become the stem and roof of the plant

Question 3

What is germination controlled by

Answer 3

Enzymes

Question 4

Why is water needed in germination

Answer 4

Let’s the seed swell and the embryo to start to grow

Question 5

What is oxygen needed for in germination

Answer 5

For the aerobic respiration

Question 6

What is warmth needed for in the germination

Answer 6

Increase growth rate and enzyme activity

Question 7

What do plants need to grow like animals

Answer 7

Vitamins and minerals

Question 8

Why do plants need calcium

Answer 8

To build cell walls

Question 9

Why do plants need magnesium to grow

Answer 9

For chlorophyll formation

Question 10

Why do plants need nitrogen to grow

Answer 10

For amino acid and protein formation

Question 11

What happens to leaves in the plant if there is no nitrogen

Answer 11

Yellow/green leaves and weak steam

Question 12

What happens in the plant if there is no potassium

Answer 12

Poor flower no fruit growth

Question 13

What happens to leaves in the plant if there is no magnesium

Answer 13

Leaves turn yellow from bottom upwards

Question 14

What happens to leaves in the plant if there is no phosphorus

Answer 14

Poor root growth and purple leaves

Question 15

Where do plants get minerals from

Answer 15

Plant roots are covered in root hair cells which take in minerals and water from the soil.

Question 16

How are the root hair cells useful

Answer 16

The root hair cells greatly increase surface area so max amount of minerals and vitamins can be absorbed. Also help anchor plant in the soil.

Question 17

What are flowers needed for

Answer 17

Reproduction of plant

Question 18

What is the stem Needed for

Answer 18

Transport system. Xylem carries water up and phloem transports glucose and nutrients around plant

Question 19

What do the roots do

Answer 19

Absorb water and minerals, large surface area in root hair cells, large vacuole and no chlorophyll

Question 20

What do the leaves do

Answer 20

Carry out photosynthesis. Large surface area to capture sunlight. Lots of chloroplast in cells

Question 21

Photosynthesis equation

Answer 21

Light
Carbon dioxide + water ————————> glucose + oxygen
Chlorophyll

Question 22

What does photosynthesis occur

Answer 22

In the leaves of the plant

Question 23

What does photosynthesis need

Answer 23

Both chlorophyll and light energy and water

Question 24

What happens during photosynthesis

Answer 24

The chlorophyll in leaves helps convert carbon dioxide and water into the products oxygen and glucose. The glucose is a food source for the plant

Question 25

What can the glucose produced be turned into

Answer 25

Starch and plant oils which are used as energy store

Question 26

The things the photosynthesis makes

Answer 26

Glucose and oxygen

Question 27

What’s happens to a plant if it doesn’t get water

Answer 27

It wilts

Question 28

Plants only carry out photosynthesis during the

Answer 28

Day

Question 29

At night plants only

Answer 29

Respire as no light to photosynthesise

Question 30

What do green plants produce

Answer 30

Carbon dioxide as a waste product for respiration Oxygen as a waste product for photosynthesis

Question 31

At midday light is strongest so

Answer 31

Photosynthesis is stronger than respiration

Question 32

At dawn and dusk the rate of photosynthesis and respiration is

Answer 32

Equal

Question 33

When the rate of photosynthesis is higher than the rate of respiration

Answer 33

Carbon dioxide moves into the leaves and oxygen exits the leaves via the stomata

Question 34

When there is no photosynthesis only respiration happens and

Answer 34

Oxygen moves into the leaves and carbon dioxide exits via the stomata

Question 35

Hydrogen carbonate indicator is purple when

Answer 35

The rate of photosynthesis is higher than rate of respiration causing CO2 levels to drop

Question 36

Hydrogen carbonate indicator stays red when

Answer 36

Normal levels of atmospheric CO2 as rates of both is equal to

Question 37

Hydrogen carbonate indicator turns yellow when

Answer 37

As photosynthesis has stopped and respiration continues to produce CO2

Question 38

Leaves for photosynthesis are for

Answer 38

Large surface area to absorb sunlight for photosynthesis

Question 39

Stem for photosynthesis for

Answer 39

Transports water and minerals up the plant to the leaves and sugars up and down the plant

Question 40

Roots for photosynthesis for

Answer 40

Large surface area (root hair cells) to adsorb minerals and water from the soil

Question 41

A plant wilts when

Answer 41

Cells lose water faster than it can take in. Plants need water to hold them up-this is a form of support.

Question 42

The plant looses water in the process

Answer 42

Transpiration

Question 43

What is transpiration

Answer 43

Mainly the due to the evaporation of water through the pores on the leaves.

Question 44

What dose the plant need the stomata and guard cells for

Answer 44

Gas exchange and also water to leave the leaf. In most leaves the pores (stomata) have special cells to close or open them. These cells are called guard cells. When the guard cells lose water they change shape this makes the leaves pores close the plant then ends up loosing water