a) Nucleus
b) Cell Wall
c) Mitochondria
d) Endoplasmic Reticulum
Answer is: Cell Wall
The cell wall is one important component that is present in plant cells but not in animal cells. Plant cells are supported structurally by their cell wall, a hard outer layer that helps them keep their shape and withstand outside forces. Plant cells have an extra layer of defense called the cell wall, which is primarily made of cellulose, whereas animal cells have a flexible outer membrane. Another characteristic of plant cells that distinguishes them from animal cells is the central vacuole, which exerts pressure. This structural difference is essential to the integrity and strength of plant cells.
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