PLANTS
TRANSPORT IN PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are connected by plasmadesmata to the sieve tube elements.
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They have a thinner cell wall than a sieve tube element.
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They contain a nucleus and mitochondria.
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Detailed explanation-1: -Companion cells are small cells containing large nucleus and abundant other organelle like ribosome, mitochondria and golgi body. It is connected with sieve tube by numerous plasmodesma.
Detailed explanation-2: -The companion cells have dense protoplasts which contain the typical organelles of plant cells, including chloroplasts and many ribosomes. The sieve elements and companion cells are interconnected by numerous branched plasmodesmata. The companion cells degenerate when the associated sieve elements cease to function.
Detailed explanation-3: -Companion cells showed a dense cytoplasm and various small vacuoles. They also revealed their characteristic large nucleus and abundant mitochondria.
Detailed explanation-4: -The nucleus contains the genetic material and helps to maintain the integrity as well as controls the various activities of the cell.
Detailed explanation-5: -Among other adaptations, companion cells therefore contain many mitochondria. This allows them to carry out cellular respiration at a high rate and, hence, release lots of energy.