Could be anything that can help represent the cell membrane visually
4 because if you have a infection it causes you not to breath properly
The <u>urethra</u> is an organ which communicates with the lower bladder in order to enable excretion of urine from the body of a living organism.
<h3>What is an excretory system?</h3>
An excretory system refers to a living system that is saddled with the responsibility of removing waste products from the body of a living organism, so as to prevent damage to the body and help maintain homeostasis.
Based on scientific information, the <u>urethra</u> is an organ which communicates with the lower bladder in order to enable excretion of urine from the body of a living organism.
Read more on urethra here: brainly.com/question/877660
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Answer:the decline of lichens is an important indicator of an imbalance in the ecosystem. this research can help system ecologists predict how pollution will affect the entire ecosystem
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