Invertebrates : 1. There is 1 phylum that does not have tissue layers, and 2 phyla...

Invertebrates :

1. There is 1 phylum that does not have tissue layers, and 2 phyla that are diploblastic. Please list the phyla and their common names in a table form

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Expert Solution

Invertebrates are the animals which do not have vertebral column and spinal cord. There are over 30 phyla dedicated to invertebrates. Protozoans are the organisms with cellular level of organization, that is they do not possess tissue layers.

On the basis of number of germ layers phylum Porifera and Cnideria or Coelenterate are diploblastic. These contain two germ layers inner endoderm and outer ectoderm. Triploblastic animals contain 3 germ layers ectoderm, endoderm and middle mesoderm.

Characteristics	Protozoa	Porifera	Coelenterate
Habitat	free living	aquatic	aquatic
Shape	irregular	plant like	Plant like
Body Symmetry	Bilateral or Radial or Asymmetric	Radial or Asymmetric	Radial
Germ layers	absent	Diploblastic	Diploblastic
Locomotion	Cilliated, flagella	sessile movement	Tentacular movement
Digestion	intracellular	Intracellular	Both intra and extracellular
Reproduction	Asexual binary fission	Both sexual and Asexual	Sexual reproduction

All Invertebrates are cold blooded animals.

gladiator answered 1 year ago

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