45. The phylum that includes vertebrates (mammals, birds, etc) also includes inv

Question

45. The phylum that includes vertebrates (mammals, birds, etc) also includes invertebrate species A. True B. False 46. The blastopore on a gastrula always develops into the mouth. A. True B. False 47.Cnidaria are diploblastic organisms and lack a mesoderm. A. True B. False 48. The Metazoa is an animal phylum of aquatic organisms. A. True B. False 49. Calcium carbonate is a very common skeletal substance among invertebrate organisms A. True B. False 50. Poriferans lack tissues A. True B. False 51. The majority of animal species are insect. A. True B. False

Explanation / Answer

45) The given statement is B. false.

Only one animal phylum chordata contains vertebrates but this phylum does not contains invertebrate species.

46) The given statement is B. false.

The blastopore, becomes the animal's mouth of animals during the development of protostome and the blastopore becomes the excretory part of animala during the development of deuterostome.

47) The given statement is A. true.

Cnidarians are diploblastic animals, which have endoderm and ectoderm layer but lack mesoderm layer.

48) The given statement is B. false.

Metazoa has multicellular animals include fish, birds, amphibians, reptiles and mammals. They  are all multicellular and are collectively known as the Metazoans.

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