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The Fundamental Unit of Life — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceThe Fundamental Unit of Life1 Mark
Question
The structure which forms a barrier between the protoplasm of the cell and its external environment in an animal cell, is:
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Answer

  1. Plasma membrane.
Explanation:
In animal cell it is plasma membrane, in plant cell it a a double barrier of plasma membrane and cell wall. Nuclear membrane is the barrier between nuclear material and other cell material. Tonoplast is the boundary/ outer wall of a vacuole.

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