Concept explainers
Introduction:
Cells are the smallest unit in every single living being. In a group, they carry all the functions to sustain life.
They are the building blocks for animals and plants to live and sustain life.

Answer to Problem 1DYKB
Correct Answer: option (C) Replacing cells through cell division.
Explanation of Solution
Explanation/justification for the correct answer:
Option c. Replacing cells through cell division.
Some cells such as neurons or in plant tissues like parenchyma cells do not perform cell division. These cells can survive without performing cell division. In the case of parenchyma cells, which are also called permanent tissues, they provide structural support to the plant.
The explanation for the incorrect answer:
Option a. Obtaining nutrients and chemical building blocks.
Cells obtain nutrients like sugar or fat; they do this to provide the cell with energy. This function is necessary for all types of cells to keep functioning.
Option b. Maintaining the integrity of the plasma membrane.
Maintaining plasma membrane integrity is essential for cellular homeostasis.
The cell membrane receives damage from the intracellular and extracellular environment to avoid lethal consequences maintaining the integrity of the cell membrane is important.
Option d. Disposing types of wastes.
For cells to function properly, the disposal of waste is necessary.
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Chapter 4 Solutions
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