B6 PLANTS

Question 1

Photosynthesis

Answer 1

How plants produce glucose using the energy from the light

Question 2

Photosynthesis

Equation

Answer 2

Carbon dioxide + water -> glucose + oxygen

Question 3

Chloroplasts

Answer 3

Part of plant cell where photosynthesis happens

Question 4

Chlorophyll

Answer 4

A green pigment that enables photosynthesis by trapping the enters in light

Question 5

Forming starch

Answer 5

As soon as they are made glucose molecules are joined together into long chains to form starch

Question 6

At night

Answer 6

Starch is converted into sugar called sucrose which is easy to move around the plant

Question 7

Uses if sucrose

Answer 7

Sucrose is converted into
Glucose for respiration
Starch for storage
Other molecules for growth

Question 8

Biomass

Answer 8

the total mass of materials in an organism (except water)

Photosynthesis is the main source of biomass

Question 9

Job of leaves

Answer 9

To conduct as much photosynthesis as possible as quickly as possible

Question 10

Leaf adaptations

Answer 10

To do more photosynthesis leaves have a : large surface area of waxy Cuticle palisade cells a sponge layer stomata

Question 11

Large surface area

Answer 11

Allows the leaf to absorb more light

Question 12

Waxy cuticle

Answer 12

A waxy coating that stops water evaporating from the leaf

Question 13

Palisade

Answer 13

Cells two cells in a leaf with many chloroplasts lots of photosynthesis

Question 14

Spongy later

Answer 14

A layer of cells with lots of gaps that allow gases to move around inside the leaf

Question 15

Stomata

Singular stoma

Answer 15

Holes in the bottom of the leaf that allow carbon dioxide in an oxygen and water vapour out

Question 16

Stomata structure

Answer 16

Each stoma

Is surrounded by two cells called guard cells that can swell to open it or shrink to close it

Question 17

How stomata work

Answer 17

During the day the stomata Open to allow gas exchange at night the stomata
Close stomata close during dry spells to stop water loss

Question 18

Limiting factor

Answer 18

A factor that holds back the rate of photosynthesis when in short supply

Question 19

The limiting factors

Answer 19

Carbon dioxide concentration light intensity temperature

Question 20

Limiting factor graphs

Answer 20

The lion sleeps up when the factor is limiting the line levels out when the factor is not limiting

Question 21

Carbon Dioxide and light intensity

Answer 21

To start with increasing them will increase the rate of photosynthesis because they are limiting eventually increasing them further has no effect as they are no longer limiting

Question 22

Temperature and photosynthesis

Answer 22

Increasing temperature towards the optimum increases the rate as particles move faster and collide more increasing past the Optimum decreases rate as enzymes denatured

Question 23

Inverse square law

Answer 23

1new =

1oringinal x d2 Original / d2 new

Question 24

Roll of roots

Answer 24

To absorb water and nutrients from the soil

Question 25

Root hair cells

Answer 25

Their role is to quickly absorb water and minerals from the soil The adaptions are long hair with increases the surface area thin cell walls to ease water absorption

Question 26

Movement of water

Answer 26

Water enters roots by diffusion and osmosis and travels to the xylem in the centre

Question 27

Diffusion in toots

Answer 27

Water defuses along the cell walls around the outside of each cell until it reaches the xylem

Question 28

Osmosis in roots

Answer 28

Water travels from cell to cell across cell membranes by osmosis and it reaches the xylem

Question 29

Minerals in the soil

Answer 29

Plants absorb minerals from the soil such as nitrates | Phosphates and potassium

Question 30

Absorbing minerals

Answer 30

Plants absorb minerals by active transport because their concentration is low

Question 31

Transportation

Answer 31

The movement of water into a plant roots up its stem and evaporating out of the leaves

Question 32

Xylem

Answer 32

Hollow tubes that carry water from the roots up the stem to the leaves

Question 33

Xylem cells

Answer 33

Their role is to carry water from the roots to the leaves There adaptions hollow to let water past no walls between neighbours to allow water through rings of ligin in to make some strong

Question 34

Factors increased greatly transpiration

Answer 34

air movement dryer air higher temperatures

Question 35

Translocation

Answer 35

The movement of sucrose sugar around the plant through the phloem

Question 36

Phloem

Answer 36

Tissue that transports sucrose around plants made of sieve tubes and companion cell

Question 37

Siege tubes

Answer 37

Cells in phloem with A large channel running through them to carry sucrose solution

Question 38

Companion cells

Answer 38

Cells in phloem that sit next to the sieve tubes and pump sucrose into the sieve tubes