Chapter 1
Earth Science
Course: Elementary Education Multiple Subjects 7001
Subject: Elementary Education Science Subtest 7005
Chapter: Life Science
Change over time in living organisms encompasses biological processes that occur during an individual organism’s life (such as growth and development) and across many generations (evolution). These changes are influenced by genetic factors, environmental interactions, and the mechanisms of heredity. Teachers must help students understand how individual traits can influence survival and reproduction, and how populations shift over time due to inherited variation and environmental pressures.
1. Life Cycles
The life cycle of an organism is the series of stages it passes through from its beginning as a single cell (zygote or spore) to its development into a mature organism capable of reproduction, and finally to its death. These stages vary greatly depending on the species, but all organisms share a pattern of growth, development, reproduction, and death.