Grade 9 Embryology Worksheet
This worksheet covers key concepts in embryology for Grade 9 science students, including stages of development, germ layers, and critical processes.
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Grade 9 Embryology Worksheet
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Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
1. Which of the following is the correct order of early embryonic development stages?
Morula, Gastrula, Zygote, Blastula
Zygote, Morula, Blastula, Gastrula
Blastula, Zygote, Morula, Gastrula
Gastrula, Blastula, Morula, Zygote
2. The outermost germ layer that gives rise to the nervous system and skin is the:
Endoderm
Mesoderm
Ectoderm
Epidermis
3. The process of cell division without significant growth, which produces a multicellular blastula from a single-celled zygote, is called .
4. The formation of the three primary germ layers (ectoderm, mesoderm, and endoderm) is known as .
5. Briefly describe the function of the placenta in mammalian embryonic development.
6. All animals undergo indirect development, involving a larval stage.
True
False