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First lets start by acknowledging what is homeostasis and why it is important to control body temperature. Homeostasis is the control of internal environment of the body to keep it relatively constant. It...

A stimulus is detected by a sensory receptor, e.g. pain detected by a pain receptor when the arm touches a sharp pin etcThis causes a nerve impulse to be created which travels along a sensory neurone to t...

Bacteria resides virtually everywhere around (and within) us. In schools and university conditions, bacteria cultures are incubated at 25°C or lower to reduce the chances of growing harmful pathogens whic...

Transpiration is the upward movement of water from the root to the cell. This happens in the xylem which is made of lignified cells. The flow is only in one direction and the movement of water is created ...

DNA polymerase is an enzyme that catalyses the synthesis of DNA molecules from free nucleotides. After DNA helicase unwinds the DNA molecule, DNA polymerase reads the existing DNA strands and incorporates...