Cells Alive 3 - Plant Reproduction

Question 1

What happens when a plant is ready to reproduce?

Answer 1

It produces flowers

Question 2

Name 3 parts of a flower

Answer 2

3 of the following…. sepal, petals, stamen, pollen grains, stigma, ovary, nectary, pollination.

Question 3

What is the male part of the flower?

Answer 3

STAMEN (comprising of anther (with pollen grains) and filament.

Question 4

What is the female part of the flower?

Answer 4

CARPEL (Sticky stigma, style, ovary (containing ovules)

Question 5

What is the function of the sepal?

Answer 5

Protects the flower bud

Question 6

What is the function of the Petals?

Answer 6

Brightly coloured to attract pollinators e.g. insects, birds and bats.

Question 7

What is the function of the anther?

Answer 7

To produce the pollen grains (male sex cells)

Question 8

What is the function of the stigma?

Answer 8

Sticky to catch the pollen grains brought by pollinators or the wind.

Question 9

What is the function of the Ovary?

Answer 9

Produces the female sex cells (OVULES)

Question 10

What is the function of the nectary?

Answer 10

Produces a high energy sugary liquid to attract pollinators (NECTAR)

Question 11

Define pollination

Answer 11

Pollination is the transfer of pollen from the anther to the stigma

Question 12

How is pollination carried out?

Answer 12

By pollinators or wind

Question 13

What is the two types of pollination?

Answer 13

Self pollination and Cross pollination.

Question 14

Define self pollination

Answer 14

The transfer of pollen from the anther to the stigma of the same plant

Question 15

Define cross pollination

Answer 15

The transfer of pollen from the anther to the stigma of a different plant

Question 16

Define fertilisation in flowers

Answer 16

The fusion of the nucleus of the pollen grain with the nucleus of the ovule. To do this the pollen grain must grow a tube from the stigma down into the ovaryy.

Question 17

What happens once fertilisation takes place?

Answer 17

The ovary becomes the fruit and the ovules becomes the seeds

Question 18

Name the three main part of a seed

Answer 18

Seed coat, food store and embryo plant.

Question 19

What is the function of the seed coat?

Answer 19

To protect the embryo from stomach acid if eaten and to protect dormant seeds from frost, water rot and soil microbes.

Question 20

What is the function of the food store

Answer 20

Contains enough food (starch) which can be used to allow the embryo plant to grow its first roots and shoots. Once the plant has it’s first leaves above the soil it can make its own food by photosynthesis,

Question 21

What is the function of the embryo plant?

Answer 21

Every seed has a little embryo inside, this will germinate into a plant if given the correct conditions

Question 22

Define germination

Answer 22

When the embryo plant grows its first shoots and roots to become a baby plant.

Question 23

What do seed need to germinate

Answer 23

WOW
Water
Oxygen
Warmth (suitable temperature)

Question 24

Name 4 ways seeds can disperse

Answer 24

Animal internal, animal external, Wind, Water

Question 25

Name a plant that disperses its seeds by wind and what is the structure of these seeds to allow them to do this?

Answer 25

Dandelion seeds are light, fluffy and parachute like

Sycamore seeds have helicopter blade like structures.

These help them to carry the seed in the wind

Question 26

Name a plant that disperses seeds by the explosive method

Answer 26

Pea plants, the pods explode throwing the pea seeds outwards

Question 27

Name a plant that disperses seeds by the animal internal method

Answer 27

Plants with brightly coloured seeds and fruit, sunflowers, apples trees etc.

Question 28

Name a plant that disperses seeds by the animal external method

Answer 28

Cleavers (sticky-willie)
or
Burdock has hooks