Answer:
The beaver population increased
Https://www.ncbi.nlm.nih.gov/pubmed/8300084
This might help
Oxygen because lipids are fats that need oxygen to use long term energy
Breast milk has been known for making healthier babies. Nucleotides found in human breast milk has been shown to boost the immune system in infants.
The genes to be resistant to an antibiotic already exist in the bacteria's genes. Those whose phenotypes are resistant to the antibiotic will survive the antibiotic which kills the other non-antibiotic-resistant bacteria. The surviving bacteria will then asexually reproduce, producing more antibiotic-resistant bacteria.
