Ecologists have studied the Galapagos islands for a long time because of the diversity of the populations thought that small colonies of finches
emerged on each of these small islands, each
they possess. It is
small population carrying only certain alleles
of the parent population. Over time, the emerging populations varied greatly from one another, leading to the development of new
species. Which mechanism of speciation best describes this scenario?
1)
A)
migration
B)
founder effect
temporal isolation
D)
behavioral isolation

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.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.