89. Urban Prairies

90. Deforestation Effects

5.13A

181–190

91. Water Life

92. Desert Biome

93. Structures

94. Structures and Functions

95. Bird Characteristics

5.13B

191–200

96. Squirrel Behaviors

97. Human Behaviors

98. Instinctual vs. Learned Behaviors

99. Wasps

100. Tiger Sharks