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Evolution by natural selection arises when these three properties are present in a system
Heredity - offspring resemble their parents in discrete characteristics.
Variat...
The reflex arc describes a sequence of events leading to an action that takes place rapidly in response to a stimulus without having to think about it i.e. without an impulse travelling to the brain for c...
Test Answer
Mitochondria are advantageous as they allow the cell to respire aerobically, without them they can only respire anaerobically. As a result of this aerobic respiration due to the mitochondria's presence th...
DNA replication occurs in the nucleus of the cell. DNA is first unwound to expose the nucleotides. This is is catalysed by DNA helicase which catalsyes the breakage of the hydrogen bonds between complimen...
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