Answer:
4.22
Explanation:
The lower the number, the more acidic.
The group of polar bears that live along the eastern coast of Russia makes up a population.
Answer:
Antibiotic resistance occurs when bacteria do some variation in their genome that allows bacteria to eliminate the effect of antibacterial drugs. Irregular or excessive antibiotics use is the main cause of generating antibiotic resistance bacteria.
So antibiotics should be taken only on the prescription of doctors and a complete course of antibiotics should be done to eliminate all the bacteria so that no bacteria is left to generate antibiotic-resistant bacteria.
Antibiotics should be avoided in viral infection as antibiotic does not kill viruses as it is only beneficial in bacterial infection.
The main way b which household disinfectant harm us is that they kill both good and bad bacteria. When good bacteria are also killed, then chances of the growth of bad bacteria increases. Further, due to over application of disinfectants, chances of development of resistance in the bacteria increases.
From your choices, it seems B might be the answer, as Disinfectants are chemicals themselves and they cross skin barrier also, so they must be harmful to the mucous and skin barriers of the skin, penetrate deep into the tissue, travel to the other parts and interfere with body systems.