Plants

Question 0

What controls size of stomata

Answer 0

Guard cell

Question 1

How stuff enters flowering plants

Answer 1

Co2 through leaves by diffusion through stomata

Water and minerals through roots

Question 2

Sensitive to light

Answer 2

Phototropism

Question 3

Sensitive to moisture

Answer 3

Hydrotropism

Question 4

Sensitive to gravity

Answer 4

Gravitropism

Question 5

Plant hormone to coordinate and control growth

Answer 5

Auxin

Question 6

Pollination

Answer 6

Transfer of pollen from anther to stigma

Question 7

3 types of nuclei in ovules

Answer 7

2 central endosperm

1 egg

Question 8

How pollen fertilises ovule

Answer 8

Pollen grain (has 2 male nuclei) on top of stigma
Grows tube down style to ovary
1 male nucleus (pollen) fuses with 2 endosperm nuclei to form food store
Other nucleus (pollen) fuses with egg nucleus (ovule) to form embryo

Question 9

After fertilisation …

Answer 9

Ovule –> seed
Ovary –> fruit
Fruit adapted for seed dispersal

Question 10

Herbicides

Answer 10

Kill unwanted plants

Question 11

How to make roots grow from a cutting

Answer 11

Rooting powder (plant hormone)

Question 12

How are wind pollinated flowers adapted

Answer 12

Large numbers of iSight small pollen grains
Anthers which hang outside the flower
Small petals
Large feathery stigmas which hang outside the petals

Question 13

How are insect pollinated flowers adapted

Answer 13

Large brightly coloured petals
Anthers and stigmas inside the petal so insects brush against them when collecting nectar
Relatively few large and sticky pollen grains to attach to insects