Bacteria<span> are single-celled, </span>prokaryotic<span> microorganisms that exist in abundance in both living hosts and in all areas of the planet.
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The answer is called monoclonal. Hope this helps and please don't forget to thank me.
Answer: c) and b) are correct.
The brain is encased in a protective bony or cartilaginous housing in craniates.
The anterior end of the nerve cord is elaborated to form a brain in craniates.
Explanation: The craniates include the chordata with well-defined heads. This includes mammals, reptiles and fishes. So we can discard the other answers. Because most craniates have functional jaws, and the adults do not lose their chordate characteristics. The last one does not apply as a specific feature because the tunicate have neural crest but are not recognized as craniata.
