Cell wall is richly impregnated with silica in__________?
Correct answer: C. Baciliariophyta
- A. Rhodophyta
- B. Phaeophyta
- C. Baciliariophyta
- D. Euglenophyta
Explanation
Bacillariophyta, the diatom group, has cell walls richly impregnated with silica, forming durable frustules. Phaeophyta are brown algae and may contain alginates, but their walls are not characteristically silica-impregnated like diatoms.
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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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