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How much water is in blood is defined by its osmolarity, i.e. how concentrated solutes such as sodium ions are in the blood. The pituitary gland in the brain releases ADH (Anti Diuretic Hormone) if there ...

There is too much thyroxine is released into the blood which raises the person's basal metabolic rate. This will lead to an increase in formation of glycogen, lipids and proteins. This will also increase ...

Natural selection is the concept that individuals in a population that are best adapted to their environment are most likely to survive and succeed to breed and produce offspring. In turn, the offspring w...

It is a random and spontaneous change to DNA that can be inherited. Most mutations have no effect on the phenotype, however some have a small effect and rarely do some have a significant effect.

Transcription is the first step in gene expression that copies a DNA molecule into an RNA molecule (transcript). Such RNA molecules can either be mRNAs, if the gene that is transcribed is protein coding, ...