Explain why there must be at least two lines on any given plane

bio 102 The atmospheric ozone layer has been __________since the banning of CFCs (chlorofluorocarbons), but a recent report sugg

sergiy2304 [10]

Answer:

protected; increase

Explanation:

Ozone is composed of trioxygen which is highly reactive gas compared to dioxygen. Ozone layer is present in stratosphere and troposphere and protect the humans from ultraviolet radiations but it may be toxic if inhaled. Ozone can be broken down into molecular oxygen by chlorine and bromine atoms.

A hole was discovered in ozone layer in 1982 and scientist believed that it could be dangerous for human health. The compounds involved in depletion of ozone are mainly Chlorofluorocarbons (CFS) and (HFCS). Then a global agreement was signed in 1987 which leads to prohibition of use of all chemicals that are involved in depletion of ozone layer. The problem of ozone depletion is solved by the agreement and ozone hole started to recover it from 2000.

But recent reports showed that the alternative chemicals used to protect the depletion of ozone layer began to trap the heat inside the earth like greenhouse effect. Now scientists are in search of chemical that can prevent both ozone depletion as well as global warming.

3 0

3 years ago

The _____ nervous system is the major nervous system that connects the brain and spinal cord to the organs and muscles throughou

andreev551 [17]

Peripheral would be the answer

5 0

3 years ago

A nurse assisting a nursing student with medications asks the student to describe how penicillins (PCNs) work to treat bacterial

Mnenie [13.5K]

Penicillins disrupts bacterial cell wall synthesis.

<h3>How does penicillin affect bacterial cell walls?</h3>

Penicillin kills bacteria by inhibiting the proteins which cross-link peptidoglycans in the cell wall .
When a bacterium divides in the presence of penicillin, it cannot fill in the “holes” left in its cell wall.
β-Lactam antibiotics, including penicillins, cephalosporins, monobactams, and carbapenems, are distinguished by a lactam ring in their molecular structure and act by inhibiting the synthesis of the peptidoglycan layer of bacterial cell walls.
Penicillins work by bursting the cell wall of bacteria. Drugs in the penicillin class work by indirectly bursting bacterial cell walls.
They do this by acting directly on peptidoglycans, which play an essential structural role in bacterial cells.