Ozone is know to cause respiratory problems in humans and damage plants. however, the ozone layer provides protection for earth. explain where ozone is found, what it does, and what causes its depletion. : )

The only thing I know about the Ozone layer is that it is found in the Stratosphere. It protects us from harmful Ultraviolet(UV) Rays. It can be harmed by CFCs, or Chloroflurocarbons, which are found in refrigerators, ACs(air conditioners), etc. 

What is the difference between cytokinesis in plant and animal cells? animal cells dived by a cleavage furrow. plant cells divide by a cell plate that eventually becomes the cell wall. cytoplasm and cell membranes are necessary for cytokinesis in both plant and animals.