what are the external and internal factor?

Organisms like birds, insects, reptiles are also oviparous. However, in these organisms the fertilisation is internal. Internal fertilisation occurs in mammals also. In internal fertilisation the sperms are released into the body of the females during copulation. The r..

Internal Defence - Second line of defence or body's internal defence is carried out by leucocytes, macrophages, inflammatory reactions, fever, interferons and natural killer cells. These operate together to check the damage to the body by the pathoge..

Internal energy is one of the most important concepts in thermodynamics. Energy changes in a body sliding with friction. Warming a body increases its internal energy and cooling the body decreases its internal energy. However, what is internal energ..

The exchange of gases between the body spaces or fluids and the cells is called internal respiration or tissue respiration. The area over which this exchange takes place is called the respiratory surfac..

- The exchange of gases between the body spaces or fluids and the cells is called internal respiration or tissue respiration. The area over which this exchange takes place is called the respiratory surfac..

Internal respiration is also called tissue respiration or cellular respiration. The bio-chemical processes involved in respiration which break down the substrate to release energy take place in the tissues within the cells of an organism. Thus, this is called cellular respiratio..

Internal respiration is also called tissue respiration or cellular respiration. The bio-chemical processes involved in respiration which break down the substrate to release energy take place in the tissues within the cells of an organism. Thus, this is called cellular respiration..

A longitudinal section of the kidney shows three distinct regions: Renal Cortex Renal Medulla Renal Pelvis A longitudinal section of the kidney showing three distinct regi..

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Since chemical changes are always accompanied by energy changes, it indicates that reactants and products must be having certain amounts of energy. A fixed quantity of any substance is associated with a definite amount of energy, which depends upon chemical nature of the substance and its state of ..