INTRODUCTION
CELL STRUCTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What structure is common to all 6 kingdoms of living organisms?
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Cell wall
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DNA
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Nucleus
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Mitochondria
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Explanation:
Detailed explanation-1: -Organisms from all six kingdoms have DNA but some are not enclosed inside the nucleus but scattered in the cytoplasm. Only eukaryotes have nuclei where DNA strands are enclosed.
Detailed explanation-2: -Ribosomes. All cellular life synthesizes proteins, and organisms in all three domains of life possess ribosomes, structures responsible protein synthesis.
Detailed explanation-3: -These six kingdoms are Kingdom Archaebacteria, Kingdom Eubacteria, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, and Kingdom Animalia. Woese found that the six kingdoms naturally cluster into three main categories, based on the sequence of 16s ribosomal RNA genes. He called these categories as domains of life.
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