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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 pa...

It is the process which uses Carbon dioxide, Water and sunlight to produce Sugar (glucose) and oxygen.

First and foremost when dealing with a question like this we need to define and understand the key concept involved, and in this instanct it is speciation: the divergence of two distinct lineages from one...

A mutation can occur, causing the formation of an antibiotic resistant gene within a bacteria. This bacteria will then survive the course of antibiotics and reproduce, passing on the gene by vertical gene...

The smooth muscle contracts, causing vasoconstriction. Vasoconstriction is the narrowing of the vessel lumen.