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B 3 Flashcards

1
Q

Process produce biogas (1)

A

Anaerobic fermentation

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2
Q

Benefit of biogas (2)

A

Gain fertiliser

Manure disposed of

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3
Q

Biogas generator not work in UK (2)

A

Lower temp

Process slower

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4
Q

Fuel gas present in biogas (1)

A

Methane

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5
Q

Active transport (2)

A

Transport low to high con
Use energy
Use protein

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6
Q

What help in active transport in small and how (2)

A

Micro villi larger SA so more diffusion to absorb ions

Mitochondria release energy

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7
Q

Why stirrer (2)

A

Maintain even temp throughout

Allow mixing of microorganisms and organic matter

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8
Q

Why jacket of cold water (2)

A

Micro organisms release energy in respiration
Maintain constant temp
Prevent denaturation of enzymes

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9
Q

Features of villi/alveoli (4)

A

Large SA
Have enzymes and mitochondria provide energy(villi)
Partially permeable
Many blood vessels
Thin wall Short distance from air to blood

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10
Q

Plant in dry (4)

A

No stomata on upper surface Less transpiration
Stomata close in day during warm period
Since warmth increase transpiration
Open at night reduce transpiration

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11
Q

Stomata on lower surface of leaf not upper (2)

A

Reduced transpiration from upper surface

Warmer above leaf

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12
Q

Produced by yeast in fermentation (2)

A

CO2

Ethanol

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13
Q

Bubbles of air enter fermenter (2)

A

Mixing

Faster respiration

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14
Q

Why glucose added to fermenter (1)

A

Use in respiration

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15
Q

Why fermenter heat up (1)

A

Energy from respiration

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16
Q

Why no contamination (2)

A

Compete for food

Harmful

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17
Q

How contamination prevented (4)

A

Sterilise fermenter and glucose and air intake

Check no leaks

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18
Q

Process water lost from leaves (1)

A

Transpiration

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19
Q

Why water lost most rapidly in wind at warm temp (3)

A

Faster transpiration
Molecules move faster
Maintain con gra

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20
Q

Ethanol gasohol for against (6)

A 
For
Renewable
C neutral no effect on global warming photo take in CO2
Less co emissions
Co toxic

Against
Release energy so burn more
More fuel loss due to evaporation
Cause deforestation

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21
Q

40*C why better biogas generator underground (2)

A

Cooler
Optimum temp of biogas production
Speed up production

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22
Q

0-25*C, 60cm thick wall biogas generator how thickness affect production (2)

A

Increase rate

Insulates

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23
Q

Take up more ions with oxygen (3)

A

Active transport
Require energy
More energy from aerobic

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24
Q

Flour contain starch and enzyme why CO2 increase (3)

A

Starch to glucose by enzyme
Used by yeast
Respiration increase

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25
Advantages of biogas generator underground (4)
Less visual impact Easier to maintain optimum temp Ease of adding slurry Withstand pressure build up
26
Why important level of inlet and overflow tank higher than slurry (1)
Prevent o2 enter
27
Why con of solids kept low in anaerobic digester (1)
Diff to stir
28
How make digester more expensive (1)
Add stirrer
29
Digester first set up biogas a lot of CO2 (2)
O2 present | CO2 produced by aerobic
30
How ethanol based fuel produced from plant materials (4)
Starch to glucose with amylase in digestion Anaerobic fermentation yeast added Ethanol distilled from fermentation products Mix with petrol to make gasohol
31
Diffusion (2)
Movement of ions from high to low con | Without energy
32
Process O2 air to blood (1)
Diffusion
33
How breathing allow O2 enter blood (2)
Keep O2 level high in alveoli | Keep O2 con in alveoli more than blood
34
Prevent contamination in lab (1)
Work near flame
35
Biogas pumped not air (1)
Prevent aerobic
36
Why muscles not store glycogen higher heart rate (3)
Cannot store glucose Need to receive elsewhere For respiration
37
Rate of biogas production slowed down at end of investigation why (1)
Organic matter used up
38
Where transpiration occur (1)
Stomata
39
In one breathing cycle how diaphragm and rib cage cause change in lung volume (3)
Rise caused by outward movement of rib cage And flattening of diaphragm Fall as return of ribcage to original position
40
Diff between ancient and modern ventilator (2)
Ancient atmospheric pressure force air into lungs | Modern air forced mechanically into lungs
41
Advantages and dis of modern ventilator (5)
A Freedom of movement Portable Not affect blood flow in lower body D Tube in trachea uncomfortable Diff to eat
42
A and d of factory farming and method (6)
M cramped, controlled temp feeding lighting, treated with prophylactic antibiotics A Increased profit / greater food production more livestock Less energy is lost through movement and keeping warm Food is high in calories so animals will grow faster Easier to vaccinate all the animals Easier to protect animals from predators Antibiotic treatment stops infections in animals D cruelty Restricted movement Faster spread of diseases residual chemicals in the food chain increasing global warming Increased pollution from animal waste and from additional transport
43
Why roots need osmosis to absorb water and active transport to absorb ions (4)
Con in soil higher than root Water high to low con Con of ions in soil less than root cells So energy needed to move ions
44
Transpiration stream (2)
Movement of water from root up stem via xylem to leaves | Water evaporates via stomata
45
Why mass of fish caught increase and decrease (2)
I fishing | D quotas
46
Why % fish caught from sustainable sources increasing (1)
Public awareness
47
2 methods maintaining fish stocks
Fishing quotas | Net size
48
Reason and effect of deforestation (6)
``` R timber for construction Grow plants for biofuel Wood as fuel Land for agriculture E increase CO2 in atmosphere due to burning activities of microbes less CO2 taken in less photo Increase methane due to rice ```
49
Osmosis (3)
Dilute to high concentrated solution No energy Partially permeable membrane
50
Cells control size of stomata (1)
Guard cells
51
Function of stomata (1)
Allow Co2 enter and O2 leave
52
Dis of many stomata (1)
Increase water loss
53
Very little water lost when grease on lower surface of leaf (3)
Lower most stomata Covered H2o cannot evaporate
54
Deforestation increase Co2 why (5)
``` Burning Microbes respiring CO2 given off by machinery Less photo Less Co2 taken by trees ```
55
Biodiversity (1)
Range of diff species
56
Why important prevent organisms from extinction (3)
Disrupt food chain Duty to preserve for future generations Loss of environmental indicators
57
How Co2 cause global warming (3)
Heat Radiated by Earth CO2 absorbs
58
Outcome of greenhouse effect (2)
Global warming | Melting ice caps
59
Why carbon neutral attract customers (1)
Customers concerned with environment
60
How get food from Britain help environment (2)
Reduce transport for food | Less Co2 emissions
61
How agricultural activities contribute to global warming (6)
Methane produced by cattle and rice More greenhouse gas CO2 from tractors Deforestation release Co2 by burning CO2 absorb energy radiated from Earth Energy radiated back to earth
62
Methane effects (3)
Absorb energy radiated by Earth Some energy reradiated Lead to global warming
63
A of adding coriander to animals food (2)
Less food converted to methane | More meat produced
64
Why most water lost at 1-3pm (3)
Brightest time of day Water evaporates fastest More stomata open

Biology (10 decks)

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