What is all necessary for natural selection to occur?

Necessary for natural selection:

It is the process in the evolution. It explains the nature and it is responsible for the evolution of adoption in the organisms to their environment. The four types of the natural selection are reproduction, heredity, variation in fitness and the variation in the individual characters among the member in the population.

It is the important factor to analysis the environment and reproduction of the organisms. The offspring are  resemble same as their parent in the natural selection.

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."

lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.