Answer: A
Explanation: Amoeba, Euglena and Paramoecium all belong to the kingdom Protista of gwhittaker’s 5 kingdom classification system. This kingdom includes all the unicellular eukaryotic organisms.
Answer:
materials/out
Explanation:
Physical limits on the flow of <u>materials</u> into and <u>out</u> of the cell prevent most cells from being too large.
<em>The limitation of the kind and amount of materials that flow into and out of the cell prevents the cell from being too large. The function of selectively allowing materials to enter and leave the cell is carried out by the cell membrane. While being permissible to some materials, it shuts some materials off and, thus, the size of the cell is maintained. </em>
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