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Individuals with the recessive sickle-cell anaemia allele have a lower chance of developing severe malaria. Therefore, they are more likely to survive and reproduce than those without the allele. The alle...

Facilitated diffusion is a passive process that occurs down a concentration gradient. Active transport requires energy (from ATP) to allow movement of substances against a concentration gradient.

Uniform. The bain of our lives as students. What does it achieve? Oppression. Regimentation. Suppressing our freedom to express ourselves. Teachers and schools insist that as students we should strive to ...

Osmosis is the process describing the random movement of water molecules through a permeable membrane from an area of high water concentration to an area of low water concentration until equilibrium is re...

Radio waves