Each excavation job as in any other case, must be evaluated as to the facts relating to the needs of a competent person, and qualified person. The professional judgement of OSHA must come into play by using our construction regulations where they apply.
Definition: A diploid cell is a cell that contains two sets of chromosomes. One set of chromosomes is donated from each parent. Examples: The diploid number of a cell is the number of chromosomes in the cell. This number is commonly abbreviated as 2n, where n stands for the number of chromosomes. For humans this equation would be 2n=46. Humans have 2 sets of 23 chromosomes for a total of 46 chromosomes:
Haploid number is the number of chromosomes in a sex cell, such as a sperm or an egg. It is abbreviated as n. Diploid number is the number of chromosomes in a non-sex cell, such as the zygote that results from a sperm cell fertilizing an egg. It is abbreviated as 2n. The diploid number of an organism will be double the haploid number, since it results from receiving one haploid set of chromosomes from each parent. Humans have a diploid number of 46 (2n = 46), meaning human sex cells have a haploid number of 23 (n = 23).