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Animal Reproduction and Development
What do you think?
LESSON
LESSON INTRODUCTION
Get Ready
Before you begin, decide if you agree or disagree with each of these statements.
As you view this presentation, see if you change your mind about any of the statements.
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Animal Reproduction and Development
Do you agree or disagree?
Get Ready
LESSON
LESSON INTRODUCTION
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Animal Reproduction and Development
Key Concepts/Essential Questions
LESSON
LESSON INTRODUCTION
3
Animal Reproduction and Development
Vocabulary
Watch out for these words!
LESSON
LESSON INTRODUCTION
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Animal Reproduction and Development
Leaving Home?
Look at the photo at the beginning of the lesson. You probably know that caterpillars turn into butterflies. This butterfly is emerging from its chrysalis (KRIH suh lus). Why do you think the different life stages of this animal look so different? What other types of animal development are there?
LESSON
LESSON INTRODUCTION
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Animal Reproduction and Development
LESSON
During sexual reproduction, a sperm cell and an egg cell join.
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Animal Reproduction and Development
Agree. The joining of an egg cell and a sperm cell is called fertilization.
Do you agree or disagree?
Lesson Review
LESSON
LESSON WRAP-UP
Do you agree or disagree?
Some animals develop inside the mother.
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Animal Reproduction and Development
Agree. Animals that develop in the mother obtain nourishment from her.
Do you agree or disagree?
Lesson Review
LESSON
LESSON WRAP-UP
Do you agree or disagree?
What are the roles of male and female reproductive organs?
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Animal Reproduction and Development
Male reproductive organs, called testes, produce sperm. Female reproductive organs, called ovaries, produce eggs. In sexual reproduction, the egg and the sperm join to form a new organism.
Key Concept/Essential Question Review
LESSON
LESSON WRAP-UP
How do the two types of fertilization differ?
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Animal Reproduction and Development
When fertilization occurs inside the body of an animal, it is called internal fertilization. Fertilization that occurs outside the body is called external fertilization.
Key Concept/Essential Question Review
LESSON
LESSON WRAP-UP
What are the different types of animal development?
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Animal Reproduction and Development
In internal development, the embryo develops inside the mother. In external development, embryos develop outside the mother. Metamorphosis is a developmental process in which the form of the body changes as an animal grows from an egg to an adult.
Key Concept/Essential Question Review
LESSON
LESSON WRAP-UP