8. How is penicillin used?
O to make cheese
O to kill protists that cause disease
O to...
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Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?
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What is one affect on the australian environment due to the introduction of non-native european rabbits? (a) more grass grew in response to the need of the growing population of rabbits. (b) the rabbits balance out the food chain as they became a natural prey to many predators. (c) the rabbits the land by digging, which caused the soil to spread much needed nutrients. (d) the rabbits out-competed other small animals species and caused them to go extinct.
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