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natima [27]
4 years ago
13

HELP ASAP!!! 20 Points!

Biology
2 answers:
miss Akunina [59]4 years ago
7 0
The hole in the Ozone Layer
Semmy [17]4 years ago
6 0

Answer:

A.The hole in the ozone layer

Explanation:

  • Montreal protocol is an international treaty that was signed to control the use of substances that are resulting in the depletion of the ozone hole.
  • This treaty was signed in the year 1987 and became effective form 1989.
  • Since the time that this treaty has come into force, there has been a significant improvement in the ozone hole that was observed over Antarctic as it's size has decreased.
  • This improvement has been possible because the treaty helped to phase out chemicals such as chlorofluorocarbons, carbon tetrachloride, etc. that are responsible for ozone hole depletion.
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Answer:I think During most of a cell's life cycle, DNA, along with proteins, is a mass of loose strands called chromatin (KROH-muh-tin). Before cell divion, DNA is duplicated, or copied. Then, in an early stage of cell division, the chromatin is compacted into visible structures called chromosomes (KROH-muh-sohmz).Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.During interphase, the cell obtains nutrients, and duplicates (copies) its chromatids (genetic material). The genetic material or chromatids are located in the nucleus of the cell and are made of the molecule DNA. hope this helps have a nice night ❤️❤️❤️

Explanation:

4 0
3 years ago
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Is called a community
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3 years ago
When caring for the client with macular degeneration, the nurse should
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