Answer:the tough outermost membrane enveloping the brain and spinal cord
Explanation:
Answer:
Sending humans to other planets may cause danger. We dont fully know what these planets are capable of doing. If there is such a thing as life on other planets then we still dont know weather or not life there is friendly or not. They could be harmful, because just as we dont know know exactly who or what they are, they dont know who or what they are either, so its a high chance they may want to defend themselves.
Explanation:
A mutation. Adaption and resistance - evolution, essentially. Those who survived the antibiotic developed a mutation which was able to resist the antibiotic and this became passed down to offspring.
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