Animal, (kingdom Animalia), any of a group of multicellular eukaryotic organisms (i.e., as distinct from bacteria, their deoxyribonucleic acid, or DNA, is contained in a membrane-bound nucleus). They are thought to have evolved independently from the unicellular eukaryotes. Animals differ from members of the two other kingdoms of multicellular eukaryotes, the plants (Plantae) and the fungi (Mycota), in fundamental variations in morphology and physiology. This is largely because animals have developed muscles and hence mobility, a characteristic that has stimulated the further development of tissues and organ systems.Animals dominate human conceptions of life on Earth not simply by their size, abundance, and sheer diversity but also by their mobility, a trait that humans share. So integral is movement to the conception of animals that sponges, which lack muscle tissues, were long considered to be plants. Only after their small movements were noticed in 1765 did the animal nature of sponges slowly come to be recognized.
Question
Animal, (kingdom Animalia), any of a group of multicellular eukaryotic organisms (i.e., as distinct from bacteria, their deoxyribonucleic acid, or DNA, is contained in a membrane-bound nucleus). They are thought to have evolved independently from the unicellular eukaryotes. Animals differ from members of the two other kingdoms of multicellular eukaryotes, the plants (Plantae) and the fungi (Mycota), in fundamental variations in morphology and physiology. This is largely because animals have developed muscles and hence mobility, a characteristic that has stimulated the further development of tissues and organ systems.Animals dominate human conceptions of life on Earth not simply by their size, abundance, and sheer diversity but also by their mobility, a trait that humans share. So integral is movement to the conception of animals that sponges, which lack muscle tissues, were long considered to be plants. Only after their small movements were noticed in 1765 did the animal nature of sponges slowly come to be recognized.
Solution
Animals are multicellular eukaryotic organisms that belong to the kingdom Animalia. They are distinct from bacteria because their DNA is contained in a membrane-bound nucleus. It is believed that animals evolved separately from unicellular eukaryotes. Animals differ from plants and fungi in terms of their morphology and physiology. The development of muscles in animals has led to their mobility, which has further influenced the development of tissues and organ systems.
Animals are dominant in our understanding of life on Earth due to their size, abundance, and incredible diversity. Their ability to move is a defining characteristic, which humans also possess. In fact, movement is so closely associated with animals that sponges, which lack muscle tissues, were initially considered to be plants. It was only later, in 1765, when their small movements were observed, that the animal nature of sponges began to be recognized.
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