4. Classification
• Scientists classify animals based on cell
structure, how cells are organized into
tissues, how tissues are organized into
organs and organs are organized into
systems.
5. Scientists classify animals into
two large groups.
• 1. Vertebrates – Animals with backbones.
• 2. Invertebrates – Animals without
backbones.
6. Invertebrate Facts
• A sponge is one of the smallest animals on Earth.
• Arthopods are the largest group of animals on
Earth.
• Mollusks include snails, clams and octopuses.
• Arthopods include insects, spiders, centipedes,
millipedes, lobster and crabs.
• Echinoderms include
starfish----------------------------------------------------
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7. Adaptation is a characteristic that
enables a living thing to survive
in its environment.
• Mimicry is an
adaptation in which an
animal is protected
against predators by
its resemblance to
another, unpleasant
animal.
• Camouflage is an
adaptation in which an
animal protects itself
against predators b y
blending in with the
environment.
9. What is inherited?
• An inherited behavior is one one that is not
learned. It is done automatically.
• Heredity is the passing of inherited traits
from parents to offspring.
10. Hybrids and Crossbreeds
• Hybrid- Living things that
have parents that are quite
different from each other,
such as donkeys and
horses.
• Crossbreed – A product of
the mating of individuals
from two distinct breeds
or varieties of the same
species.
