Section 3- Plants Flashcards

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1
Q

Photosynthesis equation

A

Carbon dioxide + water –> glucose + oxygen

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2
Q

What does photosynthesis make?

A

Glucose and oxygen

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3
Q

How are leaves adapted for photosynthesis?

A
  • broad so exposed to light
  • chloroplasts are found in the palisade layer
  • transparent upper epadermis
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4
Q

What are vasuclar bundles?

A

Xylem and phloem

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5
Q

Job of the vascular bundles

A

Deliver water and carry nutrients to parts of the lead

Take away glucose produced by photosynthesis

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6
Q

What is a limiting factor?

A

Somthing which stops photosynthesis from happening any faster

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7
Q

How to test a lesf for starch

A
  • put in boiling water
  • put in boiling tube with ethanol
  • heat in water bath
  • rinse leaf in cold water
  • add iodine
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8
Q

Why is the leaf put in boiling water?

A

To stop any chemical reactions happening inside the leaf

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9
Q

Why is the leaf put in ethanol?

A

To get rid of any chlorophyll

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10
Q

How to show that chlorophyll is needed for photosynthesis

A
  • variegrated leaves

- test for starch

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11
Q

How to show that CO2 is needed for photosynthesis?

A
  • sealed bell jar
  • soda lime
  • test the leaf for starch
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12
Q

How to show the rate of photosynthesis

A
  • light placed near test tube of Canadian pondweed in water

- measure the volume of gas produced with a gas syringe

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13
Q

What are nitrates used for in a plant?

A
  • making amino acids and proteins

- cell growth

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14
Q

Magnesium uses in plants

A

-making chlorophyll

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15
Q

Magnesium deficiency

A

-yellow leaves

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16
Q

Why do unicellular organisms rely on diffusion for the movement of substances?

A

The substances only need to travel short distances

17
Q

What is the role of the xylem?

A
  • transports water and mineral salts

- from the roots to the shoots

18
Q

What is the role of phloem?

A
  • transporting sugars like sucrose, and amino acids

- from where they are made in the leaves to other parts of the plant

19
Q

Translocation definition

A

The movement of food substances around the plant

20
Q

Transpiration definition

A

The loss of water from the plant

21
Q

Light intensity

A

Brighter light

Greater transpiration rate

22
Q

Why does the rate of transpiration decrease as the light intensity decreases?

A

Stomata begin to close as photosynthesis doesn’t happen when it is darker

23
Q

Temperature

A

Warmer temperature

Faster rate of transpiration

24
Q

Wind speed

A

Higher wind speed

Greater transpiration rate

25
Q

Humidity

A

Drier air

Faster rate of transpiration