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Q. Why can the allantois be considered an adaptation to terrestrial life?
The allantois is an adaptation to dry land because in embryos of oviparous terrestrial beings like birds and reptiles, the metabolic residuals cannot be immediately excreted to the aquatic surrounds (as amphibian and fishes larvae do). It was essential then for the appearance of a structure capable of storing the embryonic excretes until hatching.
In which meiotic division does the separation of identical chromatids occur? After the end of this process what are the ploidies of the new cells? The separation of identical c
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difference between axon and cyton
a) Name two food additives needed to keep food wholesome, and say what they do. b) Name two food additives (or types of additive) which are not necessary for keeping fo
A fire hose ejects a stream of water at an angle of 38.8 ° above the horizontal. The water leaves the nozzle with a speed of 26.6 m/s. Assuming that the water behaves like a projec
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Prothoracic Gland or PTC Prothoracic gland (PTC) or moulting gland and ecdysone or moulting hormone The 3 rd endocrine gland-prothoracic gland- is an irregular branching
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