Of the following which one is not the characteristic of dinoflagellates?
Correct answer: C. Their cells are often covered with shells of interlocking cellulose plates impregnated with calcium
- A. Most of them are unicellular
- B. They have blooms
- C. Their cells are often covered with shells of interlocking cellulose plates impregnated with calcium
- D. None of these
Explanation
Most dinoflagellates are unicellular and many produce blooms, while many have cellulose plates forming a theca. The statement about plates being impregnated with calcium is not a general characteristic, so option c is the exception; students may choose d if they overlook that calcium impregnation is inaccurate.
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About Classification of Biological Molecules
Biological molecules are classified as carbohydrates, lipids, proteins and nucleic acids, with water, minerals and vitamins also supporting cellular processes. The key distinctions involve their monomers, chemical bonds, structures and functions, including glucose and starch, fatty acids and triglycerides, amino acids and polypeptides, and nucleotides in DNA and RNA.
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