Reading Metrics
Grade Level
Middle Grades (MG 4-8)
Book Level
6.8
Points
1.0
Fiction/Nonfiction
Nonfiction
Word Count
8114
Points per Word
0.000123
Page Count
48
Points per Page
0.020833
Description
This book explains what is meant by the fitness of an organism and shows how adaptations improve a plant's or animal's chance of survival to have offspring.