Animals are a diverse group of multicellular organisms that inhabit a wide range of habitats on earth. While there are many different types of animals, some of the general characteristics that define the group include:
Eukaryotic cells: Animals are composed of eukaryotic cells, which are cells with a defined nucleus and other organelles.
Heterotrophic: Animals obtain their nutrition by consuming other organisms, either by predation, herbivory, or parasitism.
Multicellular: Unlike bacteria and other microorganisms, animals are made up of multiple cells that work together to form tissues and organs.
Movement: Most animals are capable of movement, either by swimming, flying, crawling, or walking.
Sexual reproduction: Many animals reproduce sexually, with the fusion of sperm and egg resulting in the formation of a zygote that develops into an embryo.
Nervous system: Most animals have a nervous system that allows them to sense and respond to their environment.
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