Bio

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Describe how microorganisms make carbon in starch available to plants.
Extracellular digestion; Secretion of enzymes; Starch to monosaccharides; Respire product of digestion; CO2 produced from respiration
1 of 9
What is the definition of the ecological term, population.
All organisms of one species in a habitat
2 of 9
Describe how you would place quadrats at random.
Find coordinates on a grid; Random numbers generated from telephone directory
3 of 9
Describe how you would decide the number of quadrants to use in order to collect representative data.
Calculate running mean; When enough quadrats, this shows little change; Enough to carry out a statistical test; A large number to make sure results are reliable; Work carried out in time available
4 of 9
The rate of carbon dioxide production was higher when the apple slices were in nitrogen than when they were in the air. Explain why.
Respiring anaerobically; Produces less ATP; More anaerobic respiration to produce same amount of ATP
5 of 9
Explain why a statistical test was necessary in analysing the results for the common shrew.
(A statistical test) determines the probability of results being due to chance; Enables null hypothesis to be rejected or accepted; Determines whether correlation is significant
6 of 9
In the light-dependent reaction of photosynthesis, light energy generates ATP. Describe how.
Light energy excites electron in chlorophyl; Electrons pass down electron transfer chain; Passage of electrons produce radon reactions; Electron transport chain is in the thylakoid membrane; Energy released; ATP produced from ADP + Pi
7 of 9
Describe how and explain why the efficiency of energy transfer is different at different stages in the transfer.
Some light energy fails to strike; Efficiency of photosynthesis in plants is low (2%); Respiratory loss; Loss as heat; Efficiency of transfer to consumers greater than transfer to producers (10%); Efficiency lower in older animals;
8 of 9
Explain how the intensive rearing of livestock increases net productivity.
Slaughtered when still growing so more energy converted to biomass; Fed on controlled diet with more proportion of digested food absorbed; Movement restricted so less respiratory loss; Kept inside so less heat loss; Genetically selected for higher
9 of 9

Other cards in this set

Card 2

Front

What is the definition of the ecological term, population.

Back

All organisms of one species in a habitat

Card 3

Front

Describe how you would place quadrats at random.

Back

Preview of the front of card 3

Card 4

Front

Describe how you would decide the number of quadrants to use in order to collect representative data.

Back

Preview of the front of card 4

Card 5

Front

The rate of carbon dioxide production was higher when the apple slices were in nitrogen than when they were in the air. Explain why.

Back

Preview of the front of card 5
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