Plasmodesmata are
Correct answer: D. cytoplasmic strands passing through the walls and connecting adjacent plant cells
- A. pores in the nuclear envelope
- B. the enzymes that digest the cell wall
- C. protein channels in the plasma membrane of animal cells
- D. cytoplasmic strands passing through the walls and connecting adjacent plant cells
Explanation
These fine channels of cytoplasm run through pits in the cell walls and join neighbouring plant cells into one continuous system, so water, ions and small molecules can move from cell to cell without crossing the wall. That route is called the symplast pathway. The equivalent connections in animal tissues are gap junctions.
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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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