Answer:
<h3>C. Cell walls</h3>
Explanation:
- Animals contain tissues.
- Animals are also able to move from on place to another.
- Animals are heterotrophs since they depend on other organisms for food.
But, as the animals contain animal cells, so they don't have cell walls. This is because only plant cells contain cell walls as they are dead cells, so for protection against temperature, humidity etc, plant cells have cell walls.
Animal cells don't have cell wall. Therefore, <u>option C </u> is correct.
Part A: A= cytoplasm, B= cell wall and C= cell membrane.
In Part B under this condition, we expected to see the phenomenon called plasmolysis.
<h3>How, explain your answer briefly?</h3>
Eukaryotic cells consist on a cytoplasm (internal medium) which contains different organelles. Covering the cytoplasm we found a first thin layer called cell membrane and an external rigid layer called the cell wall.
When a cell is subjected to a media with a salt concentration higher than salt concentration inside the cell (hypertonic media), water inside the vacuole (an organelle that constitutes almost 90 % of cell volume and contains water) tends to move out of the cell in response to the concentration gradient.
This phenomenon is called plasmolysis and is possible because of the permeability characteristics of cell membrane and cell wall.
Thus, this could be the answer.
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