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Unlike mammals fish have water as their gas exchange medium instead of air. Fish use gills for gas exchange, gills are specialised flaps of tissue which have the following features to allow efficient gas ...

Mitosis Human cells have 23 pairs of chromosomes (diploid - 2 copies of each chromosomes). This is a form of cell devision which makes an exact replica of the cell that is dividing. The cell grows ...

• basic anatomy of the heart: chambers, valves, structural difference between right and left side of the heart
  
• pulmonary vs. systemic circulation
  
• blood flow through the h...

Mutation Competition Females are attracted to the tail Reproduce with males with an extravagant tail Offspring pass on the characteristic of an extravagant ...

Both mitosis and meiosis use cytokinesis for the division of genetic informaton between cells, however mitosis creates identical copies known as daughter cells after just one round of cell division, where...