Unit A - The World of Living Things
A.5 - Changes in Ecosystems
Several things can cause changes in ecosystems. |
A.2 - Classifying Organisms
Classifying organisms helps people to study and learn about living things. A.6 - Plant Parts
Plants are made up of many parts that work together. Each part helps the plant survive. |
A.3 - Organisms of the Past
Learning about the past helps us learn about the present. A.7 - Plant Growth and Reproduction
Plants grow, develop, and reproduce in many ways. |
A.4 - Organisms and
Where They Live Living and nonliving things depend on one another. |
Unit B - Animals as Living Things
B.1 - Animal Characteristics
B.4 - Organ Systems
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B.2 - Animals Without Backbones
B.5 - Development & Reproduction
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B.3 - Animals With Backbones
B.6 - Animal Survival
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