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What Is an Animal (Classification of animals (Biologists have already…

- - - - An animal cannot make food for itself, so it obtains food by eating other organisms
      - Animals may feed on plants or animals or a combination of the 2
      - Food provides animals with raw materials for growth and with energy for their bodies' activities such as breathing and moving
      - To obtain energy from food, the body cells need oxygen, which can be obtained differently for different organisms
    - - Animals must maintain a stable environment within their bodies
      - If this balance is lost, the organism cannot survive for long
      - Animals are adapted to their environment so that they can maintain their internal balance better
    - - All animals have some way to move, whether it is swimming or walking
    - - Because no individual animal lives forever, animals must live forever
      - Most animals reproduce sexually, which is when they engage in the process of fertilization, which is the process of a sperm cell joining with an eggcell
      - Sperm cells and egg cell carry information about the parents, meaning the offspring have a combination of traits from the parents
      - Asexyual reproduction is the process by which a single organism produces another organism identical to the original