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Phagocytes are types of cells found in the bloodstream and tissue. They are an important part of the immune system. They recognise foreign antigens on invading pathogens and engulf them. They then dig...
The myelin sheath is a fatty layer made up of the hugely expanded plasma membrane of schwann cells which surround the axon of neurons. The axon is unprot...
1) Wind- strong winds blow the evapourated water away from the leaf so that when it condenses, it will not go back into the leaf via the stoma
2) Temperature- high temperatu...
The biological species concept classifies species as a group of actually or potentially interbreeding individuals. This means that any two individuals (well a male and female) within the gro...
Light is a sensory stimulus detected by the eye. Rods and cones located in the retina of the eye respond to light. The pupillary reflex is responsible for controlling the amount of light hitting the r...
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