Science Test AT1 Flashcards

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1
Q

Function of Stem

A

Transports water and nutrients from roots to leaves
Holds up flower

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2
Q

Function of Roots

A

Absorbs water and nurients

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3
Q

Function of leaves

A

To create photosynthasis for the plant
Creates, stores and transports glucose

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4
Q

Function of flowers

A

To carry out reproduction

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5
Q

Structure of stomata

A

Little pores surrounded by two guard cells

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6
Q

Function of stomata

A

Tiny opening allowing water, carbon dioxide and oxygen to be exchanged from plant to atmosphere

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7
Q

Function of chloroplast

A

Use energy from sun to make photosynthasis

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8
Q

Requirements for photosynthasis

A

Water, carbon dioxide, sunlight, Glucose, oxygen

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9
Q

Structure chloroplast

A

Contain green substance called chlorophyll

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10
Q

Process of photosynthasis

A

Chlorophyll uses energy from sun to mix carbon dioxide and water together making glucose. Plants also release oxygen for us

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11
Q

Structure of petals

A

Modified leafy structure, often bright coloured

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12
Q

Structure sepal

A

-Outermost part of flower
-Small leaves directly under flower

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13
Q

Function sepal

A

Protect flower bud during development

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14
Q

Function of Petal

A

To attract insects for pollination

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15
Q

Function of nectary

A

To produce nectar and attract pollinators

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16
Q

Structure of nectaries

A

Often located at the base of petals

17
Q

Function of stamen

A

To produce pollen grains

18
Q

Function of Carpel

A

To help production of seeds

19
Q

Explain pollination

A

Transferring pollen grains from anther to stigma

20
Q

Define Fertilisation

A

The fusing of a male sex cell with a female sex cell

21
Q

What does a graph need?

A

-Title
-Axis with units
-variables on correct axis

22
Q

WHat are the variables on a graph

A

x=IV
y-DV
x is bottom
y is side

23
Q

Independent variable

A

What changes

24
Q

Dependent variable

A

What you measure

25
Q

Control variable

A

What you leave the same

26
Q

Disadvantages of sexual reproduction

A

-Two sex cells needed
-Requires successful pollination which requires more time
-Requires more energy

27
Q

Disadvantages asexual reproduction

A

No variation(if parent has genetic disease young also has)

28
Q

Advantages sexual reproduction

A

Variation allows at least a few to survive climate change, disease

29
Q

Advantages asexual reproduction

A

-Only one parent needed
-Time efficient, don’t need to wait for fertilization
-Young plants are identical to parents so good genes passed on

30
Q

Fertilization process

A

Pollen lands on the stigma of a flower, pollen tube develops from pollen grain and grows down style into ovary. Male sex cell travels down pollen tube to ovule. Fertilisation occurs

31
Q

Types of asexual reproduction

A

runners
cuttings
tubers

32
Q

Cuttings

A

pieces of parent plant are removed and grown into new plants

33
Q

Tubers

A

roots like stem tubers can undergo vegetive reproduction

34
Q

Runners

A

grasses, strawberry and spider plants

35
Q

Define asexual reprodution

A

Produces offspring genetically identical to parent organism

36
Q

why is asexual reproduction less complex than sexual reproduction

A

Does not require flowers, pollinators or seed dispersal