The best and most correct answer among the choices provided by your question is the first choice or letter A.
The onion cell <span>would not have a well-defined nucleus but would have a thick cell wall and ribosomes.</span>
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Human Growth Hormone is a genetically engineered medicine which is used to treat patients who have growth defects. It is a peptide hormone which stimulates growth, cell reproduction, and cell regeneration in human and animals. A peptide is a short chain of amino acid (molecule) that is held together by peptide bonds. Human Growth Hormone is also a stress hormone which increases the levels of glucose and free fatty acids in humans and animals. It is only available as a prescription drug in the USA.
Organism that use light for their energy source and co2 for their carbon source are called photoautotrophs which are commonly known as prokaryotes.
Cancer and Tumors...
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Please refer to the definition above
