Answer:
B.) plant cells
Explanation:
Only plant cells have cell walls as well as membrane-bound organelles. Animal cells only have membrane-bound organelles while bacterial cells don't have membrane-bound organelles which makes the best answer B.
Answer:

Option B is correct.
Explanation:
There are <u>thousands</u> of proteins and only 20 amino acids.
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Answer:
Rain
Explanation: Rain can wet the mud, and cause it to slide. This is one cause of a landslide that humans don't cause. This is why rain is a natural cause for lanslides.