Are there more invertebrates than vertebrates

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

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

Which type of stimulus do mechanoreceptors detect? sound pain heat light