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Gcse > Reproduction > Flashcards

Reproduction Flashcards

1
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A
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2
Q

Reproduction

A

Sexual
Asexual

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3
Q

Asexual

A

The process resulting in genetically identical offspring being produced from one parent

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4
Q

Sexual

A

The process resulting in genetically different offspring being produced from two parents

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5
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6
Q

Sexual and asexual reproduction: number of parent organisms

A

Asexual: one
Sexual: two

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7
Q

Sexual and asexual reproduction: type of cell division required to produce offspring

A

Asexual: mitosis
Sexual: meiosis

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8
Q

Sexual and asexual reproduction: level of genetic similarity between offspring

A

Asexual: genetically identical to each other (and to the parents)
Sexual: genetically unique (and genetically different from both parents)

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9
Q

Sexual and asexual reproduction: Source of genetic variation in offspring

A
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10
Q

Sexual and asexual reproduction: number of offspring produced

A

Asexual: usually relatively large numbers
Sexual: usually relatively limited numbers

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11
Q

Sexual and asexual reproduction: Time taken to produce offspring

A

Asexual: usually relatively fast
Sexual: usually relatively slowly

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12
Q

Asexual reproduction in plants: natural method

A

A new plant is produced where the runner touches the ground
Example: runners

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13
Q

Asexual reproduction in plants: artificial method

A

Using plant cutting to reproduce plants from existing plants
Example: cuttings

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14
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15
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17
Q

Sexual reproduction in plants

A

Flowers are the reproductive organs of the plants.
They usually contain both male and female reproductive parts

19
Q

Pollination

A

Transfer of pollen grain from anther to stigma

20
Q

Pollination

A

Self-pollination
Cross-pollination

21
Q

Self-pollination

A

Transfer of pollen grain form anther to stigma of the same flower or different flower in the same plant

22
Q

Cross-pollination

A

Transfer of pollen grain from anther to stigma to a flower in a different plant of same species

23
Q

Pollinators

A

Insects
Wind

26
Q

Fertilisation

A

The fusion of male and female nuclei to form zygote

27
Q

Role of amniotic fluid

A

To protect the foetus from physical damage, absorbing any bumps and bangs.
To allow the foetus some restricted movement.

28
Q

Role of placenta

A

Allows embryo to obtain materials such as oxygen and nutrients from mother’s blood.
Allows embryo to get rid of waste products such as urea and carbon dioxide.
Secretes hormones such as progesterone which maintain pregnancy without aborting.

Gcse (22 decks)

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