During the silurian period, simple began too grow on land in damp trees.

Rank the three variables in terms of how strongly they affect the "species" composition of the bacterial communities. place the variable with the weakest effect on the left and the variable with the strongest effect on the right.

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

What are charcteristics of lithosphere?