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Natural Science > Flower Reproduction > Flashcards

Flower Reproduction Flashcards

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Biology 101 flashcards
1
Q

Flowers are what organs

A

Sexual organs

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2
Q

What can plants have both of in the same flower

A

Male and female reproductive organs

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3
Q

What are all the parts of the flower

A

Peduncle , receptacle , petals , sepals , male structures , female structures

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4
Q

What is a peduncle

A

A stem

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5
Q

What is a receptacle

A

Top part of the flower stalk where different parts attach

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6
Q

What are sepals

A

Small green leaves that protect young buds

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7
Q

Why can sepals photosynthesis

A

They are green

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8
Q

Why animal pollinated flowers petals brightly colored

A

To attract pollinators

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9
Q

What is the stamen ?

A

Male part of flower

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10
Q

What are the 2 parts of the male stamen

A

Anthers , filaments

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11
Q

Where do the anthers rest

A

On the filaments

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12
Q

What do anthers produce in their pollen

A

Male sex cells

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13
Q

What happens when female S cells and male S cells fuse together

A

This will create a seed that grows into a plant

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14
Q

What do filaments look like

A

Stalk like structures - some long , some short

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15
Q

What is the female organ in the flower

A

Pistil

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16
Q

What does the pistil have

A

Stigma , style , ovary

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17
Q

What do all parts work specifically to do

A

Receive pollen and transport it . Have it fertilized the ovules

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18
Q

When does the sigma receive pollen

A

During pollination

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19
Q

What is stigma on top of

A

Long , narrow style

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20
Q

What happens to stigma when receiving pollen

A

Becomes sticky so pollen can stick

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21
Q

What is the style

A

Long tube , connecting stigma with ovary and ovules . Supports stigma in best position to receive pollen

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22
Q

What happens after stigma receives pollen

A

Pollen tubes grow through the style , from stigma to ovules in ovary

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23
Q

What does the stamen produce

A

Pollen containing male S cells

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24
Q

How small are pollen grains

A

Small like specks of dust

25
Q

What happens if pollination does not occur

A

No fertilization , plant won’t be able to produce seeds or fruit

26
Q

Why do plants produce lots of pollen

A

To maximize chances of pollen being transferred to as many stigmas of different flowers as possible

27
Q

What does pollination involve with the stamen

A

Pollen moving from stamens to the stigma of another or same flower

28
Q

What are the different ways of pollination

A

Wind , water , animals

29
Q

What is an ovary

A

Enlarged structure at base of pistil

30
Q

What do ovules produce

A

female S cells

31
Q

What is within an ovule

A

Embryo sac

32
Q

Where will the embryo or tiny seed develop

A

The ovary

33
Q

Why don’t wind pollinators produce nectar

A

Nectar attracts insects

34
Q

Why are wind pollinators not brightly colored or scented

A

No need to attract insects

35
Q

Name a few wind pollinators

A

Grass flowers , grass wheat , corn

36
Q

Why must pollen be light and small when wind pollinated

A

To be carried easier by wind

37
Q

Why are filaments long with anthers sticking out

A

So pollen is carried easier by wind

38
Q

Why do stigmas hang out of wind pollinaters

A

To catch pollen carried by wind

39
Q

Where do plants pollinated by water live

A

Water

40
Q

Where would we be without pollinators

A

We wouldn’t have food crops

41
Q

What contains male s cells , what contains female s cells

A

Pollen , ovary

42
Q

What percent do male and female cells contain from parent plant

A

Half of DNA

43
Q

In angiosperm how many male s cells are there

A

2

44
Q

What happens after pollen lands on mature stigma of flower of same species

A

Pollen produces a tube

45
Q

Where does this pollen tube start to grow from

A

Stigma down style

46
Q

What does this pollen tube do

A

Transports male s cells to female ovules

47
Q

What is the small structure inside ovule called

A

Embryo sac

48
Q

What happens when pollen tube bursts into ovule

A

One of male S cells fertilises the female s cells in embryo sac

49
Q

What does a fertilised egg develop

A

A seed

50
Q

What does the other male s cells join with

A

Another s cell in embryo sac to form endosperm

51
Q

What happens after ovary swells and enlarges

A

Then there is a fruit

52
Q

After fertilization what happens to ovule inside ovary

A

Starts to develop into seed and the ovary wall becomes rest of the fruit

53
Q

Why are their so many different kinds of fruits

A

Seeds need to be spread to other areas to grow into new plants

54
Q

What is the gravity fruit dispersal

A

Fruit falls off tree then rolls as for away from parent tree . Once fallen animal s, water and rolling can move it

55
Q

How do animals disperse fruit

A

Animals eat plant , carry seeds in stomach , then drops off later . Some seeds are spicky to stick to animals fur

56
Q

How are seeds dispersed with explosive force

A

Seeds explode shooting small , light seeds very away from parent plant

57
Q

How are seeds dispersed by wind

A

Light seed carried by wind , some have “wings” like dandelions

58
Q

How are seeds dispersed in water

A

Pollen is released and floats to top of water , stigmas lie close to top of water , pollen rushes up against it

59
Q

What is a angiosperm

A

Flowering plants

Natural Science (9 decks)

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