Hi! My name is Nate! I’m a nitrogen molecule. Without me, you could not survive. I make up of your body! Living things use me to build and . I want to tell you a story of my life. I currently have a best friend named Nick. We go everywhere together! We call ourselves N2. N2 is a that makes up of the atmosphere! Here’s the bad news for you – living organisms (pick CAN or CANNOT) use N2. In order to use me to build and , you need to . One organism is the “break up” organism! It is that live in the . One day, Nick and I were just minding our own business, floating through the air, when we landed on the ground and bacteria changed us from N2 into two separate N’s! Now that we are separate, living organisms (pick CAN or CANNOT) use us to build and . So there I was... alone in the dirt without my best friend! Next thing I knew a sucked me up through its ! I was in the plant for a little while until a raccoon came along and me! always get their nitrogen by eating! I hung out with the raccoon for a few years in his DNA and proteins until he got hit by a truck! When the truck hit him, his body flew into a field. Over time, he was . I went from his body into the . As I sat there, a few bacteria came up to me. They were carrying something. It was NICK!!! These put me and Nick back together again. We were N2 again! N2 is always a , so Nick and I held hands as we floated back into the .

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.