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.'
First question - cell well
second question - bacteria do not have a membrane enclosed nucleus. the and of bacterial cells is found loose in the cytoplasm.
Answer:
Explanation:
Electromagnets. Electromagnets are a different from permanent magnets. Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.
There are two types of polymers, which are natural and synthetic. Although natural polymers do not affect the environment, synthetic polymers do.Synthetic polymers are anything that is manufactured or influenced by humans. Due to this, these types of polymers release reactants which are hazardous; both to humans and the environment.Synthetic polymers, which include plastics, rubber, How do polymers effect the environment?adhesives, and Styrofoam cannot be degraded into the environment, causing a buildup of these chemicals all at once, causing a release of any "excess" chemicals into the environment.From there on, polymers create garbage loads, and chemical reactants that effect the environment, and spread around. Therefore effecting anything grown or eaten around it. This could call chemical poisoning to the greenery, animals, and living organisms around it. Not all polymers are bad. In fact humans are made up of polymers. But polymers from sources such as crude oil synthesized into plastics release toxins as they break down. When you burn plastics synthesized from crude oil feedstock, carbon dioxide and dioxins can be released into the air if smoke is not properly <span>What are the bad effects of polymers on your environment?filtered as they are in high quality waste-to-energy incinerators. Also plastics </span>are non biodegradable and so landfills are used to bury the plastic this takes up space and also costs money because there is not enough room for all the <span>waste. Therefore plastics are banned in some areas.
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