As the snow melts from atop mountains in the spring, the river below begin to flood. what type of disturbance is this?
a. primary
b. secondary
c. cyclical
d. small

How many copies of genes do gametes have?

Prokaryotic and eukaryotic cells are different in many ways other than the presence or absence of a nucleus. if both archaebacteria and eubacteria are prokaryotic cells, then why are archaebacteria more closely related to eukaryotic cells than they are to eubacteria?

Alarge body of air that has similar temperature, humidity and air pressure at a given height is called a