Answer:
supporting a variety of organisms, cleaning oil from oceans, producing oxygen
Explanation:
While they do have some medical benefits, those are still being explored and its looking for <em>important roles </em>these seem more important.
Yes, DNA synthesis is a part of creating DNA.
Skin cancer is mainly due to increased exposure to UV rays from the sun. And their incidence rate has become high lately in the holes in the ozone layer caused by air pollution.
Each person has a share of resposability concerning the pollution of the ground, and this also applies for the air pollution (industries, vehicles, fires, toxic products ...).
According to NASA researchers, climate hazards could have an unexpected origin, that of air pollution generated by the Asian continent (seat of the majority of the global industry in several areas). These NASA scientists have demonstrated that the gases produced by the 20 most polluted Asian cities in the world affect global climate.
Answer:
c. selective toxicity takes advantage of structural and/or metabolic differences between host and pathogen
Explanation:
Selective toxicity is the mechanism by which antibiotics work. They cause damage to the pathogen but do not harm the host. Hence, they are selectively toxic in their mechanism. They can target both the structural or the metabolic differences between host and pathogen. Many antibiotics target unique sites in the pathogen's structure or the sites which might be present in host cells too but are not essential for the survival of the host. An example of structural difference being targeted by antibiotics is the enzymes which synthesis the bacterial cell wall so that the cell wall is disrupted. A metabolic difference being targeted would be the mechanism by which bacteria replicates so that host cell replication process is not hindered.
