Why are my muscles sore after i work out? what kind of cellular respiration is occurring?

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

Long term exposure to waves can cause sunburns and skin cancer.

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.