Deuterostomes have:

Explanation

Option C is correct.Deuterostomes have mesoderm formed from the developing gut. Deuterostomes are a group of animals that includes echinoderms, chordates, and hemichordates. They are characterized by the fact that their blastopore develops into the anus, while the mouth develops secondarily. In deuterostomes, the mesoderm is formed by a process called endocoely. Endocoely is a type of embryonic development in which the mesoderm forms from pouches that bud off from the developing gut. The mesoderm is a middle layer of tissue that forms between the ectoderm and endoderm. It gives rise to a variety of tissues and organs, including muscles, bones, blood, and the gonads.The formation of the mesoderm from the developing gut is a unique feature of deuterostomes. It is thought to be an adaptation that allows deuterostomes to grow and develop more complex bodies than their protostome counterparts.