kat5377

22.01.2021 • 

Biology

4. Why are the time periods of the Paleozoic and Mesozoic subdivided into early, middle, and late instead of named epochs, as they are in the Cenozoic? O The rocks of these time periods are too young to provide sufficient data to subdivide the periods based on the ages of rocks.
O The fossil record for the Paleozoic and Mesozoic eras is not sufficient to subdivide the periods based on the presence of organisms.
O The number of fossils discovered outnumbers the quantity needed to subdivide the periods based on the presence of organisms.
O The terms early, middle, and late are easier to remember, which removes some confusion for those studying the geologic time scale. We

Ответ:

hunterthompson2

29.08.2021

Biology

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Sulfonamides interfere with  folic acid synthesis in bacteria.

Explanation:

Sulfanilamide and other Sulfonamides are capable of inhibiting a variety of bacteria, interfering with a particular biochemical reaction (synthesis of the folic acid) which is essential for their survival. Sulfonamides are primarily used to treat urinary infections and for the treatment of otitis, bronchitis, sinusitis, and Pneumocystis pneumonia; It is used in combination with trimethoprim. Sulfonamides derivatives exert a wide range of antimicrobial activity against Gram-positive and Gram-negative bacteria.

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