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What factors affect transpiration rate?

One factor which affects transpiration rate is light. When it is lighter, the stomata is open, which allows carbon dioxide in for photosynthesis. This means that water can diffuse out the leaf, so there is a...
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Answered by Saman A. • Biology tutor
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Explain what 'water potential' is, and how it relates to bacterial cell death. (3 marks)

(1) Water potential is the measure of potential energy in water.(2) Water potential determines the tendency of water to move from one location to another, via osmosis. (3) If bacteria is surrounded with a so...
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Answered by Ann D. • Biology tutor
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For 100ml of a liquid with a mass density of 1(kg m^-3), and a specific heat capacity of 2(kJ kg^-1 K^-1), how much energy is required to increase the temperature of the liquid by 4 degrees celsius. Assume no heat loss and that the liquid does not boil.

The key equation to this question is the energy transfer equation of Q = mcT. Q represents the amount of energy put into the system, m is the mass of the object we're talking about in kg, c is its specific h...
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Answered by Henry W. • Physics tutor
2548 Views

How are lungs are adapted for gaseous exchange?

The alveoli are cell wall is one cell thick = short diffusion pathway. The alveoli are moist - so gasses can dissolve and move quicker. The alveoli are small and increase the surface area - diffuse quicker. ...
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Answered by Georgia H. • Biology tutor
2883 Views

What defines a country as a superpower?

The term "superpower" has been attributed to countries which have significant influence and a powerful global presence. A "superpower" nation can be identified by the four pillars of powe...
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Answered by Sophie W. • Geography tutor
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