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Animal Characteristics

Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, reproduce sexually, and grow from a hollow sphere of cells (the blastula) during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from 8.5 millionths of a metre to 33.6 metres (110 ft) and have complex interactions with each other and their environments, forming intricate food webs. The study of animals is called zoology. (source)


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Lesson 4 (or “Day 4”) Material

3:37 Characteristics of Animals

4:06 General characteristics of animals

8:07 Animals

 

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Special Notes and Notices

Instructor Emphasis:

  • Science & Engineering Practice: Develop and use models.
  • Cross-Cutting Concept: Systems and System Models.

Emphasize HS-LS4-4  Construct an explanation based on evidence for how natural selection leads to adaptation of populations.


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