Top answers

What are the different ways in which substances can move across cell membranes?

Passive transport Diffusion = occurs in gases or aqueous solutions whereby particles are free to move and spread from a higher concentration to a lower concentration. An example is air freshener being spraye...
AR
Answered by Alisha R. • Biology tutor
7829 Views

How does energy move through a food chain?

In most food chains, all of the energy which is used originally comes from the sun. Plants are "photoautotrophs", which means that they can use light energy from the sun to fuel their life processe...
DM
Answered by Daniel M. • Biology tutor
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How do enzymes work and what would be the effects of an increasing temperature on an enzyme controlled reaction?

Enzymes are biological catalysts that work by increasing the speed of a reaction, without being altered or used up in the reaction. Each enzyme has an active site specific to a particular substrate and there...
JH
Answered by Jessica H. • Biology tutor
3876 Views

Describe how receptors in the skin function.

Receptors in the skin detect changes in the environment, so called stimuli. These could include a change in temperature or sensation, such as increased pressure, being touched somewhere or experiencing pain....
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Answered by Luisa B. • Biology tutor
7190 Views

What is photosynthesis?

It is the process which uses Carbon dioxide, Water and sunlight to produce Sugar (glucose) and oxygen.
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Answered by Ndaba M. • Biology tutor
3660 Views