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Diffusion is the movement of a substance from areas of high concentration to areas of low concentration, down a concentration gradient. As a result of diffusion, substances may move in and out of cells, a...

The xylem and phloem are both tissues for the transportation of substances, required for normal functioning by plants. They differ in what substances they transport and how these are transported, however....

FSH stimulates oestrogen productionoestrogen inhibits FSH and stimulates LH /LH stimulates egg release

DNA (deoxyribonucleic acid) is a polymer made up of two nucleotide chains held together by hydrogen bonding between nucleotides in a double helix shape.
A nucleotide is made up of a deoxyribose sugar...

You may remember that there are broad categories of microorganisms that cause diseases, such as bacteria, viruses and fungi which all have different properties and ways of causing disease. Antibiotics are...