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Diffusion is the movement of particles from a high to low concentration and does not require energy. An example of diffusion is oxygen moving from the airways (high concentration inhaled) to the lungs (low o...

There is a variation of phenotypes in the general population 2) Some characteristics confer an advantage in the environment 3) The organisms with advantageous characteristics survive to breed and pass on the...

Active transport is the movement of solutes, either ions or molecules, across a membrane up their concentration gradient (from low to high concentrations). The process requires a carrier protein which is emb...

Body temperature is controlled by the thermoregulatory centre of the brain. After body temperature is detected by temperature receptors, a nerve impulse transmits this signal to the brain. If the body temper...

Both transcription and translation are involved in protein synthesis, transferring the information stored as DNA to amino acids. Transcription is the first process of the two, it is the formation of mRNA fro...