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SS1: BIOLOGY - 1ST TERM

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



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The term Echinodermata is derived from the Greek words, echinos meaning hedgehog and derma meaning skin. Thus, echinoderms are spiny-skinned animals.

Star Fish
Star Fish (Phylum Echinodermata)

Characteristics of Phylum Echinodermata:

Characteristics of Phylum Echinodermata include; 

1. Their bodies are radially symmetrical.

2. They are aquatic organisms found mainly in marine habitats.

3. They are triploblastic animals.

4. They are acoelomates.

5. They have no head or brain, and their bodies are not segmented. 

6. They have spiny skin and tube feet used for movement.

7. Body is covered by a delicate epidermis with an endoskeleton of calcareous plate underneath.

8. They are used as bait for fishing.

9. They reproduce sexually through gametic fusion and asexually through regeneration.  

10. Examples include Starfish, Sea urchin, Sea cucumber, Brittle star, Sand dollars, and Sea daisies.

Sea urchin
Sea urchin.
cover23
Sea cucumber.
Brittle star
Brittle star.
Sand dollars
Sand dollar.
Sea daisies
Sea daisies.

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