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Essential Grade 9 Biology Notes: Unlocking the Secrets of Cells $4.66
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Essential Grade 9 Biology Notes: Unlocking the Secrets of Cells

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This comprehensive study guide is your ultimate resource for mastering Cell Biology, a key topic in Grade 9 Science. Perfect for students looking to ace their exams, this document simplifies complex concepts into easy-to-understand notes, making learning efficient and enjoyable. What’s Include...

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  • December 7, 2024
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  • 2024/2025
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  • Bradshaw, j
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  • Secondary school
  • 9th Grade
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Biology - 11/15/2024




Grade 9: Biology
Lesson # 1 All about cells


Introduction to cells

WHAT ARE CELLS?
○ Cells are the basic structural and functional units of all living organisms.
○ Every living thing is made up of one or more cells.

Types of Cells:
1. Prokaryotic Cells:
○ Simpler, smaller cells without a true nucleus.
○ Found in unicellular organisms like bacteria.
○ DNA floats freely in the cytoplasm.
○ Examples: Escherichia coli (E. coli), Salmonella.
2. Eukaryotic Cells:
○ Larger, more complex cells with a nucleus.
○ Found in plants, animals, fungi, and protists.
○ Contain many organelles with specialized functions.
○ Examples: Skin cells, nerve cells, leaf cells.

Key Differences Between Prokaryotic and Eukaryotic Cells:
● Prokaryotes: No nucleus, no membrane-bound organelles, usually smaller.
● Eukaryotes: Have a nucleus, membrane-bound organelles, and are larger.

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