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Unit 18: Biology Part 1 Page 9 of 60

Unit Description

Animals are all around us. As we walk through our neighborhood, we likely
see animals being kept as pets, insects crawling on the ground, and birds
flying through the trees. Depending on where you live, you may also see
animals living in rivers, lakes, and swamps. How are these animals similar?
How are they different? Why do they behave in the ways they do? How do
their actions affect the environment in which they live?

These are big questions that we'll be answering in the next three sections.
We'll start off with a study of invertebrates - animals with no backbone.
From there, we'll move to the major groups of animals with backbones -
fish, amphibians, reptiles, birds, and mammals. Along the way, we'll look at
how animals in each of these groups survive, interact, and impact the world.

This is important because we share the world with some amazing creatures.
Although there's nothing wrong with simply sitting back and admiring
animals, it's even more satisfying to observe animals when you know
something about them and where they fit into the world around us. Seeing
how all these animals coexist is part of what makes our world such a
fascinating place in which to live.

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