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Biology:) > Plants > Flashcards

Plants Flashcards

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1
Q

Meristem

A

A plant tissue capable of mitosis

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2
Q

Herbaceous

A

Do not contain wood ( or lignin)

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3
Q

Transpiration

A

Transpiration the loss by evaporation of water vapour from the leaves and other aerial parts of a plant

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4
Q

Lenticels

A

Openings in the stems of plants that allow gas exchange

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5
Q

Stimulus

A

Anything that causes a reaction in an organism or in any of its parts

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6
Q

Response

A

The activity of an organism or a cell as a result of a stimulus

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7
Q

Tropism

A

A change in the growth of a plant due to an external stimulus

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8
Q

Phototropism

A

The change in the growth of a plant in response to light usually from one direction

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9
Q

Hydrotropism

A

A change in growth of a plant in response to water

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10
Q

Geotropism

A

The change in growth of a plant in response to gravity

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11
Q

Thigmotropism

A

A change in the growth of a plant in response to touch

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12
Q

Chemotropism

A

A change in the growth of a plant in response to chemicals

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13
Q

Growth regulator

A

A chemical that controls the growth of a plant

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14
Q

Végétative propagation

A

Asexual reproduction in plants

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15
Q

Runners

A

Horizontal stems that run or grow above the ground from which new plants grow

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16
Q

Bulb

A

A modified bud

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17
Q

Asexual reproductikn

A

Involves only one parent

18
Q

Sexual reproduction

A

Involves the union of two sex cells or gametes

19
Q

Gamete

A

A haploid sex cell capable of fusion

20
Q

Stamen

A

The male parts of a flower

21
Q

Carpel

A

The female parts of the flower

22
Q

Pollination

A

The transfer of pollen from an anther to a stigma of a flower from the same species

23
Q

Self-pollination

A

Involves the transfer of pollen from an anther to a stigma on the same plant

24
Q

Cross-pollination

A

Involves the transfer of pollen from the anther of one plant to the stigma of another

25
Q

Fertilisation

A

The union of two gametes or sex cells to for a zygote

26
Q

Endosperm

A

The product of the second sperm nucleus joining with the two polar nuclei that becomes a triploïde endosperm nucleus. This divides by mitosis and act as a food store for fats protein and starch

27
Q

Cotyledon

A

A seed leaf

28
Q

A non-endospermic seed

A

Contains no endosperm when fully formed

29
Q

Endospermic seed

A

Contains som endosperm when fully formed

30
Q

Radicle

A

The part of the plant embryo from which the root develops

31
Q

Plumule

A

The part of the embryo of the plant that develops into the shoot

32
Q

Fruit

A

A developed ovary

33
Q

Dispersal

A

The transfer of a seed or fruit away from the parent plant

34
Q

Dormancy

A

A resting period when a seed undergoes no growth and has little cell activity of metabolism

35
Q

Germination

A

The regrow then of the embryo after a period of dormancy if the environmental conditions are suitable

36
Q

Root tuber

A

A swollen underground root that remains dormant during winter and from which new plants may grow

37
Q

Cutting

A

A portion of a plant that is removed from a parent plant and is grown into a new independent plant

38
Q

Layering

A

The growth of a new plant from a stem that is still attached to the parent plant

39
Q

Micro propagation

A

The growth of plants from small pieces of tissue under sterile conditions using a specially selected medium

40
Q

Lignin

A

A strengthening material found in some plant cell walls

41
Q

Cohesion

A

The sticking of similar molecules to each other

42
Q

Adhesion

A

Occurs when different molecules stick together

Biology:) (14 decks)

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