Answer:B, an introduced species is not necessarily harmful to the environment, an invasive species has a negative effect
Explanation:
<span>Genetic variation in bacterial made it possible for some individuals to have resistance to the antibiotic, survive, and reproduce is a statement that explains the theory of evolution very well. Some of the bacteria that became resistant to the antibiotics, passes this down the genes for drug resistance. I hope the answer helps you.</span>
Answer:
third and fourth trophic levels
Explanation:
Malaria is spread by mosquitoes because females pick up a parasite and when they bite someone to nurture their eggs it spreads
Answer:
threaten the food webs of their invaded habitat and effect the ecosystem.
