Plant Reproduction

Question 1

Explain reproduction

Answer 1

The formation of new individuals

Question 2

Explain asexual reproduction

Answer 2

Asexual reproduction is the formation of offspring from only one parent

Question 3

Explain a method of asexual reproduction

Answer 3

Runner is a method ex, starwberries. Runners spread out from parent plant and new plants begin to form along this runner

Question 4

Name the two types of reproduction that can be used for plant reproduction

Answer 4

Asexual and sexual

Question 5

Give the function of the sepals on a plants flower

Answer 5

Protects flower as a bud

Question 6

Give the function of the petals on a plants flower

Answer 6

Protects internal parts of the flower and can be bright to attract insects

Question 7

Give the function of the carpel on a plants flower

Answer 7

Female part of the flower which produces an egg cell
Female gamete is the nucleus of the egg cell.
Can be more than one in a flower

Question 8

Give the function of the stamen on a plants flower

Answer 8

Male part of flower that produces pollen grains
Nucleus of pollen grain is the male gamete
Is often a lot of stamen in the flower

Question 9

Explain briefly what the filament and the anther are in the stamen of a flower

Answer 9

Filament: stalk that supports stamen in flower and makes it tall so it can be pollinated easier

Anther: make pollen grains

Question 10

Explain the function of the stigma as a part of the carpel

Answer 10

Acts as a landing area for the pollen

Question 11

Explain the function of the style in the carpel of a flower

Answer 11

Connects stigma to ovary

Question 12

Explain the function of the ovary in the carpel of a flower

Answer 12

Contains ovules which each produce an egg. Fertilisation takes place here

Question 13

Give the five stages of the sexual reproduction of a plant

Answer 13

1. Pollintaion
2. Fertilistaion
3. Seed/fruit formation
4. Seed/fruit dispersion
5. Germination

Question 14

Explain pollination

Answer 14

The transfer of pollen from a stamen to a carpel

Question 15

How does pollination happen for plants

Answer 15

Pollination happens because of the wind, insects(bees etc…) and other animals

Question 16

Explain fertilisation

Answer 16

The fusing of a female and a male gamete to form a zygote

Question 17

Explain how fertilisation happens in plants

Answer 17

If pollen grain of the same species lands on the stigma, pollen forms a tube
Male gamete(nucleus of pollen) travels down tube and joins with the female egg in the ovule to form a zygote
Zygote will grow to form a seed

Question 18

What occurs during the formarion of a seed and fruit

Answer 18

The zygote forms into an embryo as a part of a seed. Ovary can develop into a fruit after seed is formed

Question 19

What does the fruit do

Answer 19

Surrounds the seed and attracts animals

Question 20

What are the three main parts of an embryo and what are they

Answer 20

Plumule- forms future shoot
Radicle- forms future root
Testa- hard outercoat on a seed

Question 21

Explain dispersal

Answer 21

The carrying of the seed as far as possible from the parent plant to reduce competition.

Question 22

What would plants compete for the most of naturally

Answer 22

Light
Space
Water
Minerals

Question 23

Name four types of dispersion

Answer 23

Animal dispersion
Wind dispersion
Self dispersion
Water dispersion

Question 24

Explain with an example of a seed animal dispersion

Answer 24

Dispersed by animals eating them or sticking to them

Ex. Blackberries

Question 25

Explain with an example of a seed wind dispersion

Answer 25

Small light seeds carried by the wind elsewhere

Ex. Dandelion

Question 26

Explain with an example of a seed water dispersion

Answer 26

Seeds located beside water float and carried on the water

Ex. Cocunut

Question 27

Explain with an example of a seed self dispersion

Answer 27

Or exploding dispersal, fruits burst open scattering seeds

Ex. Peas

Question 28

Explain germination

Answer 28

The growth of a seed to from a new plant

Question 29

What conditions are needed for germination

Answer 29

Water
Oxygen
Suitable temperature

Question 30

What are the main events of germination as a process

Answer 30

Food from the seed allows root and shoot to grow
The radicle/root grows down into soil
The shoot grows up to the air
Shoot sprouts green leaves when it emerges and begins to photosynthesise making the seedling independent

Question 31

In the experiment to investigate the conditions needed for germination to occur explain what is in each test tube

Answer 31

Test tube 1(20°):wet cotton wool, seeds, stopper
Test tube 2(20°):dry cotton wool, seeds, stopper
Test tube 3(20°):cotton wool, seeds, boiled cooled water, layer of oil, stopper
Test tube 4(4°): wet cotton wool, seeds, stopper

Question 32

Why does germination only take place in test tube one in the experiment to investigate the conditions needed for germination to occur

Answer 32

Test tube 1(20°):all conditions present
Test tube 2(20°):lacking water
Test tube 3(20°):lacking oxygen
Test tube 4(4°): lacking a suitable temperature