James was observing cells under a microscope. he observed some cells which had a layer outside the plasma membrane. what is this layer called?

The answer is letter A. Plasma membrane. The plasma membrane is the outer membrane that divides the interior cells and the outer cells. The plasma membrane protects the cell from its surroundings. The plasma membrane contains phospholipids that contains protein. 

yes!

explanation:

because it has a type of fat that can make you extremely sick

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.