Biology is defined as the study of life from the Greek bios meaning ‘life’ and logos meaning study.
1.Comparative method: different species of animal can be studied and compared. This can help in the search to understand human behaviour.
2.Physiology: how the nervous system and hormones work, how the brain functions, how changes in structure and/or function can affect behaviour. For example, we could ask how prescribed drugs to treat depression affect behaviour through their interaction with the nervous system.
3.inheritance: what an animal inherits from its parents, mechanisms of inheritance genetics. For example, we might want to know whether high intelligence is inherited from one generation to the next.
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