State the phenomenon of Ozone hole
Briefly state the phenomenon of Ozone hole?
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The portion of atmosphere where Ozone is most depleted is termed as the Ozone hole, however it is not a real hole just a vast area of the upper atmosphere where there is very less Ozone than somewhere else.
Write down the differentiations between anastral and astral mitosis.
Define cell-mediated immune response?
State the type of circulatory system molluscs has? And compared it with the respiratory system of the annelids?
Describe the primary source of energy for living-beings on earth?
Define the term Vasectomy and tubectomy in brief?
How is fecundation completed in insects (internal or external)? Is there copulation among insects? Answer: Fecundation in insects is internal, by copulation.
Write a short note on the functions of calcitonin? Also write its features.
Write down the main plant tissues which form rings observed on the stem sections of some trees?
What are various biological illustrations in which lysosomic enzymes play a basic role?
Write the three main types of RNA? Also explain the meaning of heterogeneous RNA?
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