Class notes

Essential Grade 9 Biology Notes: Unlocking the Secrets of Cells

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Course
Biology

Institution
9th Grade

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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Uploaded on December 7, 2024
Number of pages 4
Written in 2024/2025
Type Class notes
Professor(s) Bradshaw, j
Contains All classes

grade 9 biology
cell biology notes
detailed science notes
high school study guide
cell theory overview
cell structure and function
photosynthesis and cellular respiration
organelles and their function

Institution Secondary school
Education 9th Grade
Course Biology
School year 1

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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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