Lesson Notes By Weeks and Term v4 - SHS 3
ECOLOGY
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ECOLOGY
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Subject: Biology
Class: SHS 3
Term: 2nd Term
Week: 2
Grade code: 3.3.2.LI.2
Strand code: 3
Sub-strand code: 2
Content standard code: 3.3.2.CS.1
Indicator code: 3.3.2.LI.2
Theme: DIVERSITY OF LIVING THINGS AND THEIR ENVIRONMENT
Subtheme: ECOLOGY
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Welcome, future scientists! Today, we are exploring one of the most fundamental principles of life: interdependency. In Ghana, we have a proverb, *"Obi nka obi ho,"* which means no one is an island. This is as true in nature as it is in our communities. From the smallest bacteria in the soil of a cocoa farm to the mighty Odum tree in the forest, every living thing is connected. This lesson will help us understand these connections, known as ecological associations, and appreciate why they are essential for the survival of all life, including our own. Understanding these relationships is crucial for farming, fighting diseases, and protecting our precious natural environment.
A. What is Interdependency?
Interdependency is the mutual reliance between two or more living organisms for survival. No organism lives in complete isolation. They depend on each other for food, shelter, protection, pollination, decomposition, and many other life processes. This web of interactions creates balance and stability in an ecosystem. B. Biological Associations (Symbiosis)
The term symbiosis refers to any type of a close and long-term biological interaction between two different biological organisms. We can classify these associations based on whether the organisms benefit, are harmed, or are unaffected by the relationship.
Let's use a simple key to understand the effects: ( + ) = The organism benefits. ( - ) = The organism is harmed. ( 0 ) = The organism is neither harmed nor benefits (unaffected).