Answer:
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A cells relatively constant internal physical and chemical conditions are called Homeostasis.
A virus structure can be on of the following: icosahedral, enveloped, complex and helical. These viruses can appear to in a shape but a closer, more steady look reveals that they are actually icosahedral.
<span>One of the advantages of genetic engineering is the ability to add vitamins and minerals supplements to food. The correct option is D. The other options given are disadvantages of genetic engineering. Apart from the advantages given here, genetic engineering has other merits, such as production of better agricultural products, increasing shelf life of products, elimination of diseases, etc.</span>