Topic D: Plant Reproduction

Question 1

What is A sexual reproduction?

Answer 1

involves a single individual making many copies of itself. parent and offspring are all genetically identical.

Question 2

What is sexual production?

Answer 2

Flowers are the sex organs of flowing plants. many flowers are HERMAPHRODITE.

Question 3

What are the male parts of the plant?

Answer 3

Anther
Stamen
Filament

Question 4

What are the female parts of the plant?

Answer 4

stigma
style
overy

Question 5

What is the function of the Sepals?

Answer 5

Protective leaflets in which the flower develops.

Question 6

What is the function of the Petals?

Answer 6

Colour lines on petals attract insects to the flower.

Question 7

What is the function of the Anther?

Answer 7

Male structure which produces pollen

Question 8

What is the function of the Filament?

Answer 8

Holds the anther near the opening of the flower

Question 9

What is the function of the Stigma?

Answer 9

Region that receives incoming pollen.

Question 10

What is the function of the Ovary?

Answer 10

female structure in which eggs (ova) are made site of fertilization.

Question 11

What is the function of the Nectary?

Answer 11

Found at the base of the filaments, produces nectar to attract insects.

Question 12

Insect and wind pollinated, position of stamen?

Answer 12

• Insect pollinated , enclosed within flower so that insect must make contact.
• Wind pollinated, Exposed so that wind can easily blow pollen away.

Question 13

Insect and wind pollinated, position of stigma?

Answer 13

• Insect pollinated , enclosed within flower so that insect must make contact
• Wind pollinated, Exposed so that wind can easily blow pollen on the the stigma.

Question 14

Insect and wind pollinated, Type of stigma?

Answer 14

• Insect pollinated ,sticky, so pollen grains attach from insects.
• Wind pollinated, feathery, to catch pollen grains blowing in the wind.

Question 15

Insect and wind pollinated, Size of petals?

Answer 15

• Insect pollinated ,large attracted to insects.

- Wind pollinated, small

Question 16

Insect and wind pollinated, Color of petals?

Answer 16

• Insect pollinated ,bright to attracted to insects.

- Wind pollinated, not bright

Question 17

Insect and wind pollinated, Scent?

Answer 17

• Insect pollinated ,to attract insects.

- Wind pollinated, Not required.

Question 18

Insect and wind pollinated, Nectaries?

Answer 18

• Insect pollinated ,present to attract insects.

- Wind pollinated, Not required.

Question 19

Insect and wind pollinated, Pollen grains?

Answer 19

• Insect pollinated ,sticky are large, grains to stick to insects bodies.
• Wind pollinated, small smooth grains to carry in the wind .

Question 20

Insect and wind pollinated, Pollen grains?

Answer 20

• Insect pollinated , small amount needed

- Wind pollinated, lots of pollen produced

Question 21

What happens during fertilization?

Answer 21

As a result of pollination, pollen is dropped on the female stigma, here the pollen grain begins to germinate. the stigma produces a surgery solution in which the pollen grains crack open releasing a pollen tube. this tube grows down the style and into the stigma. the pollen passes down the pollen tube and enters the overy and fertilizes an ovule. After fertilization the overy becomes the fruit and the fertilized ovule becomes the seed. the other other parts of the flower wither away as the fruit swells.

Question 22

Ways that plants can produce asexually (natural methods)?

Answer 22

By runners, these occur mainly on spider plants. The plant will have the same DNA as the mothering plant.

Question 23

Ways that plants can produce asexually (man made methods)?

Answer 23

By cuttings been taken of plants and either placing them in water of soil. the process of osmosis will begin to take place and the plant should then begin to grow roots etc.
This method is very cheap and quick.

Question 24

What is germination?

Answer 24

When a seed germinates, water is taken into the seed which activates enzymes. these enzymes digest the food store and provide the molecules + energy for the seed to grow a shoot (pumule) and root (radicle)