3. All animals need support systems to be able to move around their respective environments.
Explain how movement is possible in human beings by referring to:
a. The different types of joints

b. The role of the endoskeleton
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any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.