Answer:
All plants and animals need nitrogen to make amino acids, proteins and DNA, but the nitrogen in the atmosphere is not in a form that they can use.
Explanation:
When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use.
Answer:
a."Gentamicin has a longer half-life than other aminoglycosides."
Explanation:
Gentamicin is an aminoglycoside that binds to bacterial ribosomal proteins and causes the inhibition of the protein synthesis, killing the bacteria. The killing can continue for long periods after administrating the drug and even once that the concentrations of this one can no longer be detected in the plasma. That is the reason why this drug is given once a day.
Energy moves from one trophic level to another as organisms feed on one another.
Explanation:
Energy flows from one trophic level to another in a food chain. according to the ten percent law, only ten percent of the total energy passes onto the next trophic level. While studying the energy flow model two aspects should be taken under consideration. Firstly, the flow of energy is unidirectional and passes on from autotrophs to primary consumer and then secontary, tertiary so on. Secondly the amount of energy decreases at succesive trophic level.
