Topic D - Plant Reprodction

Question 1

Name the female parts of a flower

Answer 1

Carpel - stigma

        - style
        - ovary
        - ovum

Question 2

Name the male parts of a flower

Answer 2

Stamen - anther

- filament

Question 3

Function of petals

Answer 3

Attracts insects with colour and scent

Question 4

Function of sepal

Answer 4

Protect flower in bud and when closed

Question 5

Function of receptacle

Answer 5

Supports all the other parts of the flower

Question 6

Function of nectary

Answer 6

Produces nectar to attract and reward insects

Question 7

Function of ovary

Answer 7

Contains one or more ovule

Question 8

Function of ovule

Answer 8

Contains an ovum

Question 9

Function of style

Answer 9

Supports the stigma

Question 10

Function of stigma

Answer 10

Catches pollen on its sticky surface

Question 11

Function of anther

Answer 11

Pollen producing structure

Question 12

Function of filament

Answer 12

Stalk supporting anther

Question 13

Explain process of pollination ( 5 steps)

Answer 13

1. Stigma mature and ready for pollination
2. Pollen grain lands on sticky stigma
3. Pollen grain grows a tube down through style
   towards the ovary
4. Tube breaks through ovary wall and nucleus of
   pollen grain fuses with an ovum nucleus

5. Fertilised cell is called a zygote which develops into  
    a embryo ( contained in a seed )

Question 14

Definition of cross-pollination

Answer 14

Transfer of pollen from anther of one flower to stigma of another

Question 15

Definition of self pollination

Answer 15

Transfer of pollen from anther of one flower to stigma within the same flower

Question 16

What are the 3 conditions needed for germination

Answer 16

Moisture
Warmth
Oxygen

Question 17

What 5 conditions are need for plant growth

Answer 17

Mineral ions
Light
Moisture ( water )
Warmth
Carbon dioxide 

‘Growth occurs due to photosynthesis carried out by green leaves’

Question 18

Explain formation of seed ( 5 steps )

Answer 18

1. After fertilisation zygote divides and begins to form
   embryo plant
2. After few days beginnings of embryo root and
   shoot system, and 1 or 2 leaves can be seen
3. Embryo plant structure known as seed is
   surrounded by tough protective coat

4.Growth of embryo plant within in seed may pause
and stay in a resting place- DORMANT

5. Seeds stay dormant till condition are right for
   growth

Question 19

Explain process of germination ( 8 steps)

Answer 19

1. When conditions right for growth embryo will start to
   grow (germination)
2. Begins by taking in water through small pore in
   seed coat
3. Water dissolves enzymes in the embryo seed leaves
4. Enzymes digest stored food + make it soluble
5. Soluble food diffuses to embryo root +shoot so they
   can grow
6. Root grows first- absorbs water + minerals from
   ground
7. Shoot grows next- meets light
   - becomes green starts
   photosynthesis
8. Now plant can make own food

Question 20

Definition of sexual reproduction

Answer 20

Fertilisation of ovule by pollen grain

Question 21

Definition of asexual reproduction ( give examples )

Answer 21

Reproduction where only 1 parent is needed

eg. stem tuber (potato) , bulb (onion)

Question 22

Definition of a clone

Answer 22

Offspring of plant which carries out asexual reproduction

It is genetically identical to parent plant