Ans.
There are twenty amino acids that take part in protein synthesis. These amino acids act as precursor for all protein molecules and are known as essential amino acids. Plants can synthesize all twenty amino acids from simple precursors, while animals can make only twelve amino acids. Animals obtain remaining eight amino acids by eating plants.
Thus, the correct answer is 'option) D.'
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❖ During the g2 phase, growth and final preparation for mitosis occurs.
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Answer:
First, rain will have to occur. The lake and surfaces will have water in them, after that it will a while for the surface to evaporate into water vapour, after that the water vapour will condense into water droplets and when the clouds are too heavy because of too much water droplets in them, it will start to rain again and this cycle will keep going on continuously.
