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SS1: BIOLOGY - 1ST TERM

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  1. Introduction to Biology | Week 1
    6 Topics
    |
    2 Quizzes
  2. Recognizing Living Things | Week 2
    3 Topics
    |
    1 Quiz
  3. Organisation of Life | Week 3
    3 Topics
    |
    2 Quizzes
  4. Classification of Living Organisms | Week 4
    6 Topics
    |
    2 Quizzes
  5. Kingdom Prokaryotae / Monera & Kingdom Protista | Week 5
    4 Topics
    |
    3 Quizzes
  6. Kingdom Fungi & Kingdom Plantae | Week 6
    10 Topics
    |
    2 Quizzes
  7. Kingdom Animalia I | Week 7
    7 Topics
    |
    1 Quiz
  8. Kingdom Animalia II | Week 8
    6 Topics
    |
    2 Quizzes
  9. The Cell | Week 9
    4 Topics
    |
    1 Quiz
  10. The Cell Structure and Functions | Week 10
    5 Topics
    |
    1 Quiz
  11. The Cell and its Environment | Week 11
    5 Topics
    |
    1 Quiz
  12. Nutrition in Plants | Week 12
    5 Topics
    |
    1 Quiz



Lesson 9, Topic 2
In Progress

Forms in Which Living Cells Exist

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Topic Content:

  • Cells as Unicellular and Independent Organisms
  • Cells as a Colony (e.g. Volvox, Pandorina)
  • Cells as Filaments
  • Cells as a Part of a Multicellular Organism
Amoeba

Cells of living organisms exist in different forms and they are;

  • Unicellular/single and free-living
  • As a colony
  • As a filament
  • As part of a living organism

1. Cells as Unicellular and Independent Organisms:

Unicellular organisms are organisms that have a single cell. These organisms are capable of living independently without depending on other cells e.g. Amoeba, Paramecium, and Euglena.

structure of amoeba
Structure of amoeba.
structure of paramecium
Structure of paramecium.

Each organism can carry out all life processes such as movement, growth, nutrition, reproduction, excretion, respiration, etc.

cell 3
Feeding in amoeba.

 

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