An Introduction to Biology

Contents: Introduction. 1. The protozoa. 2. Porifera-celenterata. 3. Triploblastica-annelida. 4. Platyhelminthes-nematodes. 5. The mollusca. 6. Arthropoda-crustacea-arachnida. 7. Insecta. 8. The unity and diversity of living things. 9. Evolution-adaptation. 10. Variation. 11. Heredity-the discovery made by Mendel. Index.