Artificial selection is when humans manually breed certain species to get a different trait, whether it is size or color. The most famous occurrence of this is wolves to dogs.<span />
1. Brackish water is most commonly found in rivers. (It is where the Fresh water meets the sea water)
2. The answer would have to be true
3. Air temperature does not affect tides.
Science study the life cycle of pathogens in order to find a way to interrupt the course of disease and spread of infection. Scientist study the life cycle of microorganism in order to find a way to cancer and other chronic illness.
Explanation:
The life cycle of microorganisms causing disease in the human is studied to know what agents or antibiotics would stop their activity. There are techniques used such as chemotherapy to kill the invading viruses. The antibiotics are made this way to stop bacterial growth. The agents would be invented to put stop at the particular phase of the life cycle to inhibit growth of the pathogen. It would get convenient to make agents if at immune level it is known what phase of their cycle is reactive.