Me answer these ! ; 0; (60 points) ( 1 ) - what is the defining characteristic of invertebrates? what are four characteristics of chordates? ( 2 ) - name two waste products that are produced by an animal's cells. why must these waste products be eliminated from an animal's body?

1)The defining characteristic that separates invertebrates from other organisms is the absence of the spinal column and backbone.

A notochord, a dorsal hollow nerve cord, pharyngeal slits, post-ana.l tail.

2) Carbon dioxide is a waste product produced by the animal's cells during cellular respiration, as well as ammonia because it could be very toxic and is also a common by-product of animal waste due to the often inefficient conversion of feed nitrogen into animal product.