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This is a common topic to come up in exams, often worth many marks. Eutrophication is an ecological process which often occurs when humans are irresponsible with waste products that can end up in bodies of w...

This is the net passive movement of molecules down the concentration gradient from an area of high concentration to an area of low er concentration, through a partially permeable membrane.

This is the movement of particles from an area of high concentration to an area of low concentration.

Overview of oxydative phosphorelation: At the end of the electron transport chain, electrons are transferred to molecular oxygen, which splits in half and takes up H + to form water.

An allele is a variant or alternate form of gene which are found on same gene loci. Humans are diploid organisms having two alleles for a given gene. However in nature more than two variants are possible. On...