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An organism that can cause disease - e.g. virus, bacterium, fungus

Less chlorophyll in the leaves means that less photosynthesis can occur. The process of photosynthesis produces glucose, so less photosynthesis will mean that there is less glucose produced. This leads to...

An action potential is an all or none response which has a threshold voltage which needs to be reached by the stimulus. A stimulus will call depolarisation of a nerve axon. This is caused on the entry of ...

The chances of a human male having a longer lifespan could be increased via a variety of factors and ways. Three examples of such ways are listed below.
The availability of clean, drinkable water for...

An endocrine gland is a set of cells that secrete hormones directly into the blood. An example would be the pituitary gland.
Another type of gland is an exocrine gland but these use ducts to secrete ...