8B2c Reproduction in Plants

Question 1

What do sepals do? (1)

Answer 1

Protect the flower bud

Question 2

How does the flower attract animals (mainly insects)? (2)

Answer 2

SCENT and COLOURED PETALS

Question 3

Describe the MALE parts of the flower (5)

Answer 3

STAMENS (FILAMENT holding up an ANTHER) produce POLLEN GRAINS - which contain the MALE GAMETES (gamete = sex cell)

Question 4

Describe the FEMALE parts of a flower (5)

Answer 4

CARPELS (STICKY STIGMA, STYLE, and OVARIES) contains the OVULES - female gametes

Question 5

What are the 4 main stages of Reproduction in a plant?

Answer 5

Pollination, Fertilisation, Dispersion, Germination

Question 6

What is POLLINATION? (4)

Answer 6

Pollen is carries from the ANTHER of the male STAMENS to the STICKY STIGMA of the female CARPEL

Question 7

What is FERTILISATION? (11)

Answer 7

The POLLEN grain GROWS a TUBE through the STYLE to the OVARIES. The pollen NUCLEUS then TRAVELS down and FUSES with a NUCLEUS of an OVULE in the OVARY.

Question 8

What is DISPERSION? (4)

Answer 8

The OVULES DEVELOP into SEEDS and the CARPEL often becomes a FRUIT.

Question 9

What is GERMINATION? (2)

Answer 9

When, under the RIGHT CONDITIONS (water, warmth, air), the seed then STARTS TO GROW.

Question 10

What happens in Germination? (3)

Answer 10

1. The ROOT grows FIRST (to anchor, and collect water)
2. Then the SHOOT grows.
   The seed uses energy from its food store.

Question 11

What are the 2 main methods of pollination, and in each case how is pollen designed for the job? (2 + 2)

Answer 11

1. ANIMALS (usually insects) - pollen is STICKY.

2. WIND/WATER (gives us hayfever) - pollen is FEATHERY and LIGHT

Question 12

Give 5 kinds of SEED DISPERSAL, and an example of each (10)

Answer 12

1. WIND (sycamore)
2. WATER (coconuts)
3. EATEN by ANIMALS (berries, fruits)
4. CARRIED by ANIMALS (burrs)
5. EXPLOSIONS (peas)