_________________ cells of phloem are directly involved in transport of organic solutes?
Correct answer: D. Sieve element
- A. Parenchyma
- B. Companion cell
- C. Tracheid
- D. Sieve element
Explanation
Sieve elements form the conducting tubes through which phloem transports sugars and other organic solutes. Companion cells support and regulate sieve elements but are not the main conducting cells, so b is the likely choice when support is confused with direct transport.
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About Cytoplasmic Organelles
Cytoplasmic organelles are the specialized structures suspended in cytoplasm, including mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles and centrosomes. Questions compare their structures and functions in animal and plant cells, including chloroplasts and the role of the endomembrane system in transport and secretion.
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