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Flashcards in Plant reproduction Deck (35)
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Sexual organs of a flowering plant

Its flowers, which produce pollen and ovules containing the flower's gametes

1

Advantages of sexual reproduction

-produces variety
-has survival value in a changing environment

2

Advantages of asexual reproduction

-no partner needed
-faster
-requires less energy
-has survival value in a stable environment

3

Most methods of asexual reproduction in plants involve

Some part of the plant growing, then breaking away from the parent plant before growing into a new plant

4

Natural methods of plants reproducing asexually

Runners, bulbs, rhizomes and tubers

5

Artificial methods of asexual reproduction in plants

Cuttings, micropropagation

6

Sex cells in plants

In flowers, specialised haploid sex cells.
Male sex cells: the pollen grains
Female sex cells: ova

7

Why clone plants? (6)

-to produce genetically identical copies of a plant with favoured characteristics
-to quickly produce many mature plants
-to produce plants in the absence of pollinators
-to preserve rare or endangered plants
-to make copies of plants that have been genetically modified
-to produce plants that do not grow easily from seeds (eg orchids)

8

How do tubers work in a potato plant?

Potato tubers form underground at the ends of branches from the main stem. Each potato can produce several new plants from the 'eyes' which are bulbs.

9

How do runners work?

A new plant is produced where the runner touches the ground

10

Bulbs

-the bases of leaves which have become swollen with food
-buds in them can develop into new plants
-plants can form more than one bulb

11

Pollination

The transfer of pollen from the anther to the stigma

12

Self pollination

Transfer of pollen from the anther of a plant to the stigma of the same plant

13

Cross pollination

Transfer of pollen from flower onto flower on different plant

14

The fusion of male and female gametes

Fertilisation

15

Petal function

Large and colourful to attract pollinators

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Anther function

Contains pollen grains

17

Ovule function

Will become seeds when they are fertilised

18

Filaments function

Hold the anthers in place

19

Ovary function

Where the ovules are

20

Receptacle function

Hold the main parts of the flower in place

21

Stigma function

A sticky surface for the pollen to land on

22

Sepal function

Protect the flower when it is in bud

23

Style function

Provides a path for the pollen from the stigma to the ovary

24

What is the job of the seed?

Food store for the plant embryo (to be used in germination)

25

What is the point of the fruit?

Seed dispersal (fruit gets eaten by animals)

26

4 ways seeds are dispersed

Animals
Wind
Water
Plant itself

27

Why do seeds needs to be dispersed?

So new plants have enough space, light and water

28

What makes up the stamen (male organs)

Anther
Filament

29

What makes up the carpel (female organs)

Stigma
Style
Ovary