What is population density? answers are a. the number of organisms of a species
in a particular area. and b. the area occupied by a particular species in the ecosystem. c. the total number of organisms within a fixed area. and d. the total number of organisms of a particular species.

Option C.

Population density is the total number of organisms within a fixed area.

Explanation:

Population density is the total number of organisms per unit area. Population density is calculated by dividing the number of organisms by the unit area either in square kilometers, squaremeters, square miles.

Population density =number of organisms ÷ unit of land area.

protocol for imps extraction focusing on membrane protein extraction, solubilisation, and purification.

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.