Topic 6- Plant Structures and their Functions Flashcards Preview

GCSE Biology - Edexcel > Topic 6- Plant Structures and their Functions > Flashcards

Flashcards in Topic 6- Plant Structures and their Functions Deck (69)
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1

In a food chain, consumers eat other organisms. What word is used to describe organisms that make their own food?

producers

2

What process do plants and algae use to make their own food?

photosynthesis

3

In what sub-cellular part of a plant cell does photosynthesis occur?

chloroplast

4

What substance from the air do plants need for photosynthesis?

carbon dioxide

5

What substance from the ground do plants need for photosynthesis?

water

6

What organs do plants use to get water from the ground?

roots

7

How are roots adapted to getting water from the ground quickly?

large surface area, root hair cells

8

What energy-storing compound is made in photosynthesis?

glucose

9

Suggest one use for glucose in a plant.

respiration, making other substances

10

In what sub-cellular part of a plant cell does respiration occur?

mitochondria

11

What product of photosynthesis is a gas at room temperature?

oxygen

12

Plants photosynthesise. Name one other group of organisms that photosynthesise.

algae or cyanobacteria

13

What reactant in photosynthesis is a gas at room temperature?

carbon dioxide

14

What are all the materials that make up an organism known as?

biomass

15

In what subcellular parts of plants does photosynthesis occur?

chloroplasts

16

Where does all the energy originally come from in most food chains?

the Sun

17

What polymer inside chloroplasts is made from glucose?

starch

18

Name the main sugar that is transported around most plants.

sucrose

19

How are most leaves adapted to only allow gas exchange during the day?

stomata

20

What do we mean by the ‘rate’ of photosynthesis?

the speed of the reactions

21

What is a rate of reaction?

how fast a reaction happens

22

What do we call something that prevents a rate of reaction increasing?

limiting factor

23

If light intensity is a limiting factor, what happens to the rate of photosynthesis when it is increased?

The rate increases.

24

When there is plenty of light and plenty of carbon dioxide, suggest one factor that could be limiting.

temperature or water

25

What happens to the rate of photosynthesis as a plant is moved further away from a light source?

It decreases.

26

What relationship is shown by a straight line through the points on a scatter graph?

linear relationship

27

What sort of linear relationship is shown by a straight line through the origin?

direct proportion

28

Higher and Triple only- By what law does light intensity vary with distance?

inverse square law

29

Higher and Triple only- What is light intensity inversely proportional to?

distance squared

30

What happens to plants if they do not get enough water to fill their cells?

They wilt.