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IGCSE Biology > Reproduction In Plants > Flashcards

Reproduction In Plants Flashcards

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1
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does pollen do?

A

Delivers the male gametes

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2
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the flower stalk do?

A

Forms a base for the flower

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3
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the style do?

A

Holds up the stigma

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4
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the filament do?

A

Supports the anther

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5
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the anther do?

A

Produces pollen

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6
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the sepal do?

A

Protects the flower in bud

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7
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the petal do?

A

It secretes a sugary solution called nectar

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8
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the nectary do?

A

Attracts insects

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9
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the ovary do?

A

Contains the female gametes

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10
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What does the stigma do?

A

Receives pollen

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11
Q

FLOWER PARTS AND THEIR FUNCTIONS:

What is the micropyle?

A

The entry point for the male nucleus at fertilisation

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12
Q

What is the stamens?

A

The male parts of the flower

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13
Q

What is the carpel?

A

The female parts of the flower

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14
Q

What are hermaphrodite plants?

A

Plants that have male and female sexual parts on the same individual

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15
Q

What are self sterile plants?

A

Plants that have special proteins on the surface of the stigma that prevent pollen tubes forming if pollen comes from the anthers of the same plant.

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16
Q

What is insect pollination?

A

Pollination of plants by insects

17
Q

What is wind pollination?

A

Pollination of plants by wind

18
Q

What is fertilization?

A

The fusion of the male and female gametes

19
Q

What is a fertilised ovary called?

A

A fruit

20
Q

What withers away after successful fertilisation?

A

Sepals, petals, anthers, stigma and style.

21
Q

What happens to the fertilised ovule?

A

It develops into a seed

22
Q

What does the micropyle do after fertilisation?

A

It allows the entry of water and oxygen as the seed germinates

23
Q

What is a plumule?

A

A young shoot

24
Q

What is a radicle

A

A young root

25
Q

What do the plumule, the radicle and the cotyledons combine to make?

A

The embryo

26
Q

What is the endosperm?

A

Tissue which forms the food store in cereal crops

27
Q

What are cotyledons?

A

Seeeeeed leaves!!!!

28
Q

What do cotelydons do after fertilisation?

A

Form the food store for the embryo (in some cases)

29
Q

What is the testa?

A

The seed coat

30
Q

What does the testa do?

A

Prevents the embryo from drying out

31
Q

What is germination?

A

The development of a seed to a young plant

32
Q

What 3 things does a seed need to germinate?

A
  • a supply of water
  • oxygen for aerobic respiration
  • temperature suitable for enzymes
33
Q

What is germination controlled by?

A

All powerful enzymes!! They wanna take over the world, BWAHA!!!

34
Q

What is seed dormancy?

A

A resting state of a seed. They use very little food at this time.

35
Q

What allows seeds to remain dormant?

A

The seed’s very low water content

36
Q

What allows seeds to escape dormancy and germinate?

A

Availability of water

37
Q

A type of germination is called hypogeal germination. What does hypogeal mean?

A

“Below the ground”

38
Q

Why must the seedling begin to photosynthesise?

A

Otherwise all the food stores will be used up

39
Q

What happens if a seed is planted too deep?

A

The shoot cannot get above the ground before all the food stores are used up

IGCSE Biology (19 decks)

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