How many of the animal phyla include single celled animals?

None of the animal phyla include single celled animals.

Majorly all group of animals are classified under the kingdom Animalia. The chief characteristic is that all species of animals are eukaryotic and multi -cellular. The animals have a heterotrophic mode of nutrition unlike plants and algae which are autotrophs. Most organisms of this kingdom are motile and reproduce sexually only with few exceptions. The body of the animals is well organized into tissues or complex organ for performing specific functions.

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human impact on the environment can be seen in the deterioration of the !

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an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.