How many valence electrons does carbon have available for bonding to other atoms

What will happen if deforestation continue to destroy the green plant on the planet

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.

Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.