2007-03-08 10:15:05 · 4 answers · asked by sbeharry03 1 in Science & Mathematics ➔ Biology
True only of animal cells and certain single-cell creatures. Plants, fungi, and most bacteria have cell walls exterior of their plasma membrane.
2007-03-08 10:17:48 · answer #1 · answered by The Tridentine Avenger 3 · 0⤊ 0⤋
Yes - the plasma membrane is really the outer boundary of all living cells, whether they have cell walls or not. The cell walls are relatively "leaky" with a fairly open weave. That doesn't make a convincing boundary. The plasma membrane is the part that determines what materials can enter or leave the cell, so that's the boundary.
2007-03-08 18:24:17 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋
yes. The membrane is semipermeable. It allows something to pass into and out of the membrane while blocks the others.
2007-03-08 18:18:11 · answer #3 · answered by Finoai 2 · 0⤊ 0⤋
Yes with exception of plant cell (has cellulous outlayer)
2007-03-08 18:23:17 · answer #4 · answered by The Catalyst 4 · 0⤊ 0⤋