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Changes in blood water levels are detected by the hypothalamus through the negative feedback mechanism in homeostasis (2 marks). The pituitary gland releases anti-diuretic hormone into the bloodstream as ...

The steps are as follows:The desired gene is isolated by 'cutting' it out using a restriction enzyme. The same restriction enzyme is then used to 'cut' a vector (plasmid or virus). These can either be lef...

Red blood cells transport oxygen around the body via the circulatory system and are the most common cell in the blood. They carry a special protein called hemoglobin which binds to oxygen, allowing it to ...

Eukaryotic cells contain mitochondrion, to produce energy for the cellA nuclear membrane to contain the DNA strands which control the cellCytoskeleton for the movement of molecules and to aid with stabili...

To test for presence of lipids, you use an emulsion test.First, crush the seen to release the contents.Next, add ethanol and shake.Then add water and shake again.If lipids are present in the seed, the mix...