The kingdom Animalia consists of organisms that are heterotrophic, lack cell walls, eukaryotic, and show multicellularity.
Further Explanation:
Among all the five kingdoms, kingdom Animalia is the largest of all and comprises all the animals. The prokaryotes or protists are not involved in this kingdom and are categorized into separate kingdoms. Therefore, the animals in this kingdom are eukaryotic in nature. These animals are also multicellular and obtain their food and nourishment from other organisms, so are called heterotrophs.
They lack cell walls which are a characteristic of a plant cell. The body of these animals contains tissues that are composed of cells and are specialized to perform specific functions. These animals show movement and mostly reproduce sexually by the fusion of sperm and egg. The adultcells are diploid in such animals as a result of fertilization.
The kingdom Animalia is divided into ten subphyla namely Coelenterata, Porifera, Nematoda, Arthropoda, Annelida, Mollusca, Protochordata, Platyhelminthes, Vertebrata, and Echinodermata. There are approximately 10 million animal species residing on the Earth. The animals vary in size containing few cells to many tons of weight.
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Answer Details:
Grade: Higher secondary
Subject: Biology
Chapter: Kingdom Animalia
Keywords:
Kingdom Animalia, Coelenterata, Porifera, Nematoda, Arthropoda, Annelida, Mollusca, Protochordata, Platyhelminthes, Vertebrata, Echinodermata, eukaryotes, multicellular, heterotrophs.
