Match each soil horizon to the description of its formation horizon A

parent material barely affected by soil

formation process

horizon

undergoes the most change, barely

resembles parent material

accumulation of organic material

horizon B

decomposed organic material mixes with

highly weathered parent material

horizon

Horizon A es deficiente en minerales.

Horizon B sufre la menor cantidad de cambios.

La roca madre se encuentra debajo de las capas del suelo.

Explanation:

A-Decomposed organic material mixes with highly weathered parent material

B-Undergoes the most change, barely resembles parent material

C- Parent material barely affected by soil formation processes

O- Accumulation of organic material

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).