OBJECTIVE LIFE SCIENCE
CELL BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Cells that were the first living things on earth, were most likely ____
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eukaryotic cells
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prokaryotic cells
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eubacterial cells
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plant cells
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Explanation:
Detailed explanation-1: -The first cells were most likely primitive prokaryotic-like cells, even more simplistic than these E. coli bacteria. The first cells were probably no more than organic compounds, such as a simplistic RNA, surrounded by a membrane.
Detailed explanation-2: -The eukaryotes developed at least 2.7 billion years ago, following some 1 to 1.5 billion years of prokaryotic evolution.
Detailed explanation-3: -First cells on ancient Earth may have emerged because building blocks of proteins stabilized membranes. Life on Earth arose about 4 billion years ago when the first cells formed within a primordial soup of complex, carbon-rich chemical compounds. These cells faced a chemical conundrum.
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