During light reactions:

carbon dioxide is released by stomata.
water is split into hydrogen and oxygen.
chemical energy is converted into light energy.
all of the above.

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Identify the composition of oceanic and continental crystal rocks.in a model of earth’s interior,where would these rocks appear?