How does precipitation assist in the rock cycle

I believe this will help When water freezes in cracks and crevices in rock and expands, the rocks are physically broken apart. The amount of rainfall will affect weathering as will the types of plants in the area (which are greatly affected by the amount of rainfall), whose roots break rocks apart and may chemically dissolve some rocks.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.