Overview

AB PAT Grade 9 K&E Science

Biological Diversity

3. Ecosystems and Interdependence

3.2 Biodiversity, Species relationships basic

Biodiversity and Species Relationships: How Life Connects in Every Ecosystem

You will discover how the variety of life and the relationships between species from mutualism to predation shape the health and stability of every ecosystem on Earth.

What You'll Learn

You will learn how biodiversity makes ecosystems more stable and resilient.

You can identify mutualism, commensalism, and parasitism using real examples.

You will trace energy flow through food chains and food webs clearly.

You will connect species relationships to conservation and ecosystem health.

What You'll Practice

You will classify symbiotic relationships using clownfish and barnacle examples.

You will explain why high biodiversity helps ecosystems recover from disturbances.

You will identify producers, consumers, decomposers, and keystone species roles.

Why This Matters

Understanding biodiversity and species relationships helps you explain how ecosystems stay healthy, why species depend on each other, and what happens when that balance is disrupted.

This Unit Includes

1 Video lesson

Practice exercises

Learning resources

Skills

Biodiversity

Symbiosis

Food Webs

Ecosystems

Conservation

PROVINCE-TESTS Curriculum Aligned