Fossil evidence and other observations have enabled scientists to recognize several trends in hominid evolution. which of the following correctly states the order of development of hominid characteristic and traits?

a-first the ability to make and use tools, then to walk upright on two legs.

b-a larger brain developed into a smaller brain.

c-first language developed then the ability to make and use tools.

d-first the ability to walk upright on two legs, then ability to use and make tools.

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.