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Flashcards in Biology Deck (41)
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1

Name 3 differences between plant and animal cells

Plants have a cell wall, chloroplasts, large vacuole and rectangular shape

2

What do plant and animal cells both have

Cell membrane, nucleus and cytoplasm

3

Where do chemical reactions in cells take place?

Cytoplasm

4

What contains the genetic information in a cell?

nucleus

5

How are root hair cells adapted?

large surface area for absorption

6

How are palisade cells adapted?

Lots of chlorophyll and rectangular shape so no gaps between them

7

What is diffusion?

Movement of particles from high concentration to low down a concentration gradient

8

How do substances move in and out of cells?

Diffusion through cell membrane

9

What is osmosis?

Movement of water from dilute solution to concentrated solution

10

How does water enter cells?

Osmosis

11

What is the symbol equation for photosynthesis?

6CO2 + 6H2O = C6H12O6 + 6O2

12

What happens to the glucose made by photosynthesis?

Used in respiration, transport or stored as starch

13

Why do we use aquatic plants for photosynthesis experiments?

To see the bubbles given off

14

What is chlorophyll used for?

Trap sunlight for photosynthesis

15

What allows gases in and out of a leaf?

Stomata

16

Why are nitrates taken in through roots?

Make amino acids for growth

17

Why is magnesium taken in through roots?

To make chlorophyll

18

What does xylem transport?

Water

19

What does phloem transport?

Sugar

20

Describe the pathway of water through a plant from soil to the air

In through root hairs, into root, then into xylem which takes it up through the stem to the leaf and out through stomata

21

What is transpiration?

Evaporation of water from the xylem into the mesophyll layer

22

What speeds up transpiration?

Hot day, dry day (less humid) and windy day

23

What is gravitropism?

Plants growing towards or away from gravity

24

What is phototropism?

Plants growing towards or away from light

25

What is the name of the plant growth hormone and where is it made?

Auxin - tip of the shoot

26

How does a plant grow towards light?

Auxin collects on dark side and makes those cells grow faster so plant bends

27

Why do roots grow down?

Gravity pulls auxin to the bottom of the root which stops those cells at the bottom growing and so it bends down

28

Where is pollen produced?

Anthers

29

What is pollination?

Transfer of pollen from an anther to a stigma

30

What is fertilisation?

When the nucleus of a pollen fuses with the nucleus of an ovule