Plant Reproduction Y10

Question 1

How many parents are involved in Asexual Reproduction?

Answer 1

1

Question 2

How many parents are involved in Sexual Reproduction?

Answer 2

2

Question 3

What are the genes of the plants produced in Sexual Reproduction?

Answer 3

Genetically Varied Offspring

Question 4

What are the genes of the plants produced in Asexual Reproduction?

Answer 4

Creates genetically identical offspring

Question 5

Is cell division Involved in Sexual Reproduction?

Answer 5

Meiosis to make male and female gametes then mitosis following the fusing of gametes at fertilisation

Question 6

Is cell division involved in Asexual Reproduction?

Answer 6

Uses mitosis only

Question 7

What is Meiosis?

Answer 7

Meiosis is the type of cell division that produces gametes. A human body cell contains 46 chromosomes arranged in 23 pairs. Human gametes are haploid – so their nucleus only contains a single set of 23 unpaired chromosomes.

Question 8

Example of Sexual Reproduction?

Answer 8

Many Plants and Animals

Question 9

Example of Asexual Reproduction?

Answer 9

More common in plants (although some animals do e.g. Green Hydra)

Question 10

What is the Survival Value in Sexual Reproduction?

Answer 10

In Changing Environment

Question 11

What is the Survival Value in Asexual Reproduction?

Answer 11

In Stable Environment

Question 12

What is Pollination?

Answer 12

Pollination is the transfer of pollen from the anther of a plant to the stigma of a plant.

Question 13

What is Self Pollination?

Answer 13

Pollination is the transfer of pollen from the anther of a plant to the stigma of a plant.
If this occurs within the same flower

Question 14

What is Cross Pollintation?

Answer 14

Pollination is the transfer of pollen from the anther of a plant to the stigma of a plant. If this pollen is transferred to the stigma of a different flower

Question 15

What are the petals like in Insect Pollinated plants?

Answer 15

Large and colourful to attract

insects

Question 16

What are petals like in Wind Pollinated plants?

Answer 16

Small & dull colours
*Beware – colour can’t be seen in a
B&W test

Question 17

What is the position of the stigma in Insect Pollinated plants?

Answer 17

Enclosed within the flower so that
insect brushes past and deposits
pollen

Question 18

What is the position of the stigma in Wind pollinated plants?

Answer 18

Hangs outside of the flower so

that it catches pollen on the wind

Question 19

Details about the stigma in Insect Pollinated plants?

Answer 19

Sticky in order to collect pollen

from the insect

Question 20

Details about the stigma in Wind Pollinated plants

Answer 20

Large and feathery in order to

catch pollen on the wind

Question 21

Position of the anthers and why? for Insect Pollinated plants?

Answer 21

Enclosed within the flower (NB
NOT the plant) so that insect
brushes past and picks up pollen

Question 22

Position of the anther and why? for Wind pollinated plants?

Answer 22

Hangs outside of the flower so

that wind blows pollen away

Question 23

What are pollen grains like for insect Pollination?

Answer 23

Large and hooked grains in order

to attach to the insect

Question 24

What are Pollen grains like for wind Pollinated plants?

Answer 24

Large amount of small, light pollen

Question 25

What is the process of Pollination?

Answer 25

Each Pollen grain grows a pollen tube which digests it’s way down the style to the ovule using enzymes. It grows around the ovary to the opneing of the ovule. The tip dissolves and the pollen grain nucleus moves out the tube into the ovule. The male pollen grain nucleus fertillises the female ovum nucleus. The fertillised ovum is called a zygote.

Question 26

What is the definition of Pollintation?

Answer 26

Pollination transfers pollen grain to the stigma

Question 27

What is the definition of Fertillisation?

Answer 27

Fertilisation is the fusion of
the male and female
gamete to produce a
zygote.

Question 28

What following things occur after fertillisation?

Answer 28

The ovule becomes a seed
 The ovule wall becomes the seed coat (testa)
 The ovary becomes a fruit
 The ovary wall becomes the fruit coat

Question 29

How are seeds dispersed?

Answer 29

By wind (e.g. sycamore seed), by water (e.g. coconut), by animals (e.g. raspberry)

Question 30

Why are seeds dispersed?

Answer 30

To reduce competition for light/mineral ions/water with parent plant and other
offspring

Question 31

wHERE DOES SEXUAL REPRODUCTION IN Plants occur?

Answer 31

Ovule

Question 32

Where do Embryos devlelop in plants (Sexual Reproduction)?

Answer 32

Seed

Question 33

Where is the female gamete in plants?

Answer 33

Ovule

Question 34

Where is the male gamete in plants made?

Answer 34

Anther

Question 35

When are seeds dispersed?

Answer 35

When they are dry

Question 36

What factors are needed for germination?

Answer 36

Warmth, Oxygen and Water

Question 37

How does Warm Temperature affect germination?

Answer 37

Increase kinetic energy so that rate of

reaction is high

Question 38

How does Water affect Germination?

Answer 38

Activate enzymes that break down food

reserves in the seed

Question 39

How does Oxygen affect Germination?

Answer 39

For aerobic respiration which provides

energy for growth

Question 40

Explain the process of Germination?

Answer 40

Food reserves in the seed are broken down, providing glucose for respiration.
 The radicle grows downwards, to absorb water and mineral ions
 The plumule grows upwards, allowing leaves to absorb light. Once the small
plant is able to photosynthesis, germination is over.