Which organisms initiate the cycling of matter in an ecosystem

Decomposers

Explanation:

Decomposers break down dead organisms which recycles many nutrients back into the ecosystem

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.

a covalent bond, specfically triple bond