An element is a pure substance. (Like gold) and A compound is a substance that contains two or more elements; Like Water and oil. They are together but they will not mix. The oil separates from the water and floats on top.
Answer:
Antimicrobial agents may be defined as the agents that can kill or inhibit the growth of the microorganism. These agents are important and can safe the humans from the pathogens.
The pathogen and human ribosomes is quite different. Human is a eukaryotes and contains the 80'S ribosomes whereas prokaryotes have 70'S ribosomes. In the preparation of the antimicrobial agents, the advantage can be taken as the bacteria or prokaryotes have different ribosome subunit. The drugs that can selectively target the pathogens ribosomes and stops the translation whereas shows no effect on human's translation.
Living creatures and the soil exchange phosphorus. Phosphates are taken up by plants from the soil and assimilated into organic molecules. Plants are consumed by animals, which then moves phosphorous up the food chain from one animal to the next. When an animal perishes and decomposes, phosphorus is released back into the soil.
Answer: Eutrophication
Explanation:
Eutrophication occurs when the amount of nutrients and minerals deposited in water bodies such as rivers, lake etc is at an increased rate such that the number of aquatic organisms multiplies leading to reduction in oxygen present in the water. Examples of human activities that cause eutrophication are
- uncontrolled use of fertilizer
- application of chemical such as pesticides, herbicides on farms, as they could be washed by rain into nearby lakes