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A short living plant in called.

(a) How many million year ago, gigantic reptiles used to dominate on earth ? Give their common name and also mention the period and year in which they were predominanat on earth. (b) Why did these gigantic reptiles disappear from the earth in a short duration ? (c ) Name the most advanced living reptiles. List atleast two characters in which they resemble in mammals.

A short live phase between meiosis II and II is

A : Poultry farming has definite advantage over live-stock rearing R : Poultry birds are easy to raise, can be acclimatised to a wide range of climatic conditions, have short life span and are prolific breeders

When the leaves are small and short lived, the petioles expand and become green to synthesise food as in

Statement -1 : Actinoids are very difficult to study. Statement-2 : Actinoids are radioactive elements having very short half lives especially of later members of actinides.