Which term represents animals without backbones?

invertebrates. animal's without backbone.

verterbrates- animals with backbone

preservation because he preserves part of the land and preserves means save

explanation:

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.