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plant reproduction > jh > Flashcards

jh Flashcards

1
Q

petals

A

attracts pollinators, protects pistil and stamen

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2
Q

anther

A

produces pollen

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3
Q

filament

A

holds up anther

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4
Q

stigma

A

receives pollen

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5
Q

style

A

holds up stigma

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6
Q

ovary

A

contains ovules

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7
Q

ovules

A

houses egg cells / site of egg fertilisation

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8
Q

nectary

A

attractant to promote animal pollination

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9
Q

sepals

A

defensive organ / protects reproductive structures

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10
Q

stamen

A

produces pollen

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11
Q

carpel

A

female part

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12
Q

fertilisation

A

fusion of two gametes

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13
Q

asexual reproduction in bacteria (method) (speed)

A
  • binary fission
  • very rapid process
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14
Q

asexual reproduction advantages

A

-rapid
-rarity
-food storage
-same genetics passed on

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15
Q

asexual reproduction disadvantages

A

-bad genetics passed on
-produces clones
-can’t adapt

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16
Q

sexual reproduction advantages

A

variety

17
Q

sexual reproduction disadvantages

A

-bad genetics
-energy + time for mate
-slow

18
Q

sexual reproduction cell division by …

A

meiosis

19
Q

asexual reproduction cell division by …

A

mitosis

20
Q

role of pollen tube

A

-tube grows down style
-enters the ovary
-tube enters via micropyle
-transports male gamete

21
Q

germination

A

sequence of events that take place when the embryo in a seed develops into a plant

22
Q

cotyledon

A
  • starch store
23
Q

plumule

A

embryo shoot

24
Q

radicle

A

embryo root

25
Q

testa

A

tough seed root

26
Q

micropyle

A

hole made by pollen shoot

27
Q

why does water need to enter seed

A

-activates enzymes
-so it can digest stored fat

28
Q

Why do seeds need to be dispersed away from the parent plant?

A

Redues:
- overcrowding
- competition
For:
-water
-light
-minerals

29
Q

Plant fertilisation process (5 marks)

A
  • pollen grain lands on stigma
  • grows pollen tube down style
  • enters ovary via micropyle
  • nucleus of pollen grain travels down pollen tube
  • fuses with egg inside the ovule
  • ovule becomes the seed
30
Q

Germination WOW (water)

A
  • activate enzymes like amylase and protease
  • which digest stored starch and proteins (in cotyledon)
31
Q

Germination WOW (oxygen)

A
  • for release of energy for germination
  • through respiration
32
Q

Germination WOW (warmth)

A
  • for enzymes to work effectively
  • higher temp means more kinetic energy
  • greater chance of collisions between ES complexes
  • therefore more reactions

plant reproduction (1 decks)

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