Description of photoperiod
Give a brief description of photoperiod?
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Photoperiod is daily time period of light exposure of living being. The photoperiod might differ according to period of year.
Explain the term mechanical digestion? In arthropods, molluscs, earthworms, birds and vertebrates, in common, which organs correspondingly participate in this kind of digestion?
Briefly explain the term diabetes mellitus?
Explain about the classes into which mollusc are divided? Provide some of the representing beings of each class?
Which substance stimulates the production of the red blood cells? Which organ is responsible for secreting that particular substance? Under which conditions this secretion does increases?
Give a brief explanation of the term Ecology.
Name the first human heart chamber into which the blood enters? Where does the blood go subsequent to passing that chamber? Give the name of valve which separates the compartments? Why is that valve essential?
Name the categorization of hypersensitivity?
Name the four groups of protozoans?
Name the germ layer from which blood cells originate? What are the other organs and tissues made from that germ layer?
Briefly define the term malpighian organ?
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