Long chains of amino acids are found in? ?

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

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

In which state was more than 100 billion tons of coal mined in 2005?