Answer will be germs like bacteria, virus, fungi, and protozoa that can cause disease
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Answer:
There are many way's we change local ecosystems one way is urbanization.
Explanation:
If the human race keeps building on more land ecosystems will die out and animals will become extinct.
Answer:
Continuous variations are formed due to chance segregation of genes during gamete formation, crossing over and chance combination during fertilization. They can increase adaptability of the race but cannot form new species.