What is a fossil.
A response to maintain balance in the body. (ex sweating when body temp. is high)
OR
What is a common ancestor?
OR
What is sugar?
Shows the evolutionary relationship between species.
What is an evolutionary tree?
OR
What is a phylogenetic tree?
Found in the human body that help in biochemical reactions by breaking down molecules into smaller parts.
Tree -> caterpillar -> mouse -> bird
If the mouse increase, this organism would be harmed.
Caterpillar
Structures that were useful in the past by ancestors but are no longer by the current species.
What is a vestigial structure?
A type of homeostasis that attempts to bring the body back to original state. (ex shivering to warm up)
OR
What is a solute?
A biotic limiting factor where fighting over mates, food, or territory occurs.
What is a competitor?
OR
What is carbon dioxide?