When all the grains in a rock are large and easy to see, the rock is described as a. extrusive.
b. fine grained
c. coarse grained
d. nonbanded.

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

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.