Chapter 1
Earth Science
Course: Elementary Education Multiple Subjects 7001
Subject: Elementary Education Science Subtest 7005
Chapter: Life Science
The unity and diversity of life describe both the common biological foundations shared by all organisms and the vast variety of life forms adapted to different environments. This concept integrates the ideas of shared ancestry, evolution, biological classification, and the role of adaptation in survival. Educators must help students grasp that all organisms follow similar life processes, yet possess distinctive features shaped by their environments.
1. Unity of Life
All living organisms, regardless of complexity or habitat, share certain universal characteristics:
- All are composed of cells, either unicellular or multicellular.
- All use energy to maintain biological processes.
- All maintain homeostasis, regulating internal conditions.
- All respond to external stimuli.
- All grow, develop, and reproduce.
- All possess genetic material (DNA or RNA) that codes for proteins and traits.