Lesson Notes By Weeks and Term v4 - SHS 2
BIOLOGY AS THE SCIENCE OF LIFE
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BIOLOGY AS THE SCIENCE OF LIFE
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Subject: Biology
Class: SHS 2
Term: 1st Term
Week: 4
Grade code: 2.1.1.LI.2
Strand code: 1
Sub-strand code: 1
Content standard code: 2.1.1.CS.1
Indicator code: 2.1.1.LI.2
Theme: EXPLORING BIOLOGY IN SOCIETY
Subtheme: BIOLOGY AS THE SCIENCE OF LIFE
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This lesson explores the fascinating world of simple organisms that we often overlook in our daily lives. We will investigate how organisms like the common bread mould (*Rhizopus*), the green moss on our compound walls, and the beautiful ferns in our gardens have a significant impact on our economy. By understanding their roles, both positive and negative, we can appreciate their importance in agriculture, industry, medicine, and the environment in Ghana. This knowledge helps us make informed decisions, whether as farmers trying to prevent crop spoilage, entrepreneurs starting a plant nursery, or simply as citizens concerned about our environment.
Introduction: What is "Economic Importance"?
In Biology, "economic importance" refers to the impact an organism has on human well-being, particularly concerning our resources, wealth, health, and environment. This impact can be positive (beneficial) or negative (harmful). Beneficial Effects: Contribute to wealth, health, or environmental stability. Examples include producing food, medicine, industrial chemicals, or improving soil fertility. Harmful Effects: Cause financial loss, disease, or environmental damage. Examples include causing food spoilage, spreading diseases to humans or crops, or acting as invasive species.
Organism 1: Rhizopus (e.g., *Rhizopus stolonifer* - Black Bread Mould)
What it is: *Rhizopus* is a common type of fungus belonging to the group Zygomycetes. It is a saprophyte, meaning it feeds on dead and decaying organic matter. You see it as a fuzzy, cottony growth (the mycelium) with tiny black dots (the sporangia, which contain spores) on stale bread, fruits, and vegetables.