Answer:
An amoeba's economic value can be found in medicine and nutrient recycling. According to Biology Reference, certain amoeba species can cause sickness and death, while others are important in maintaining healthy ecosystems because they recycle the nutrients needed by bacteria and keep the bacterium population under control.
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Answer:
measure the time it takes for a dog to run a certain distance
Answer: this is called passive transport and it does not require energy.
Octopus<span> muscle fibers run in all directions; when contracted, they form a "skeletal" support system.</span>
