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almond37 [142]
3 years ago
5

Which theory of aging suggests that mechanical functions of the body work less efficiently as people age?

Biology
1 answer:
enyata [817]3 years ago
5 0

It is the wear and tear theory of ageing.

The wear and tear theory defends that ageing is caused by the damage that happens as time goes by to cells and body systems. The name of the theory reflects this idea of wearing out - the organism is worn out and doesn't function normally. This is the theory that's accepted more generally as common sense but there are other theories of ageing that see the process as a more intentional process.

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<h3>Research variables</h3>

In every scientific investigation, there are different variables. These include:

  • Independent variables: These are the variables that are supplied by the researcher and often varied to produce different effects. It is often referred to as the 'cause' variable.
  • Dependent variables: These are variables that are measured in the course of research. They are a result of the effects of the independent variable on the experimental subjects or groups. They are otherwise known as 'effect' variables.
  • Constant variables: Variables that are applicable to all experimental groups and are usually kept constant.

Also, there are different groups in research:

  • Control group: The reference group. The group that is not fed with the independent variable and forms the basis for comparison in order to understand the effects of the independent variable.
  • The experimental group: The group that is fed with the independent variable.

More on research variables can be found here: brainly.com/question/25115889

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