The cell membrane is comparable to a security guard. It regulates the substances that enter and exit cells, allowing necessary substances in and keeping harmful ones out.
The organelle that can be compared to a security guard who determines who is allowed to enter and exit a building is the cell membrane. The cell membrane, also known as the plasma membrane, is a biological structure that separates the interior of cells from the outside environment. It functions similarly to a security gatekeeper, regulating the transport of substances in and out of cells. For example, it allows useful substances such as glucose and amino acids to enter the cell while preventing harmful substances from entering. In this way, the cell membrane ensures the safety and functionality of the cell, acting as its security guard.
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b. False
Answer:
Protein rebuilds muscle. Nucleic acid does storage and expression of genetic information.
Explanation:
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b. greater than the concentration of carbon dioxide in the air or water.
c. lower than the concentration of oxygen in the air of water.
d. lower than the concentration of carbon dioxide in the air or water
circulatory
endocrine
digestive
respiratory
Answer:
respiratory
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Answer:
All living organisms show movement of one kind or another. All living organisms have internal movement, which means that they have the ability of moving substances from one part of their body to another.