22. Why do you think the sea urchin was chosen to test the effect of changes in pH?

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Why does the skin of your finger shrink when you wash clothes for a long time?

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels