Cell wall is extremely well preserved in fossil specimens in__________?
Correct answer: A. Diatoms
- A. Diatoms
- B. Dinoflagellates
- C. Slime moulds
- D. None of these
Explanation
Diatom cell walls contain hydrated silica, which resists decomposition and can remain preserved as a fossil. A student may choose dinoflagellates, but their coverings are generally organic cellulose plates rather than strongly mineralized silica walls.
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About Animal and Plant Cell
Animal and plant cells share a plasma membrane, cytoplasm, nucleus, ribosomes, mitochondria and endoplasmic reticulum, but plant cells also have a cellulose cell wall, chloroplasts and a large permanent vacuole. Questions cover organelle structure and function, differences between the two cell types, and how membranes control movement of substances.
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