Examlex
The circle of Willis is formed by the two ____________________ arteries and the ____________________ artery.
Mating
The pairing of individuals for reproductive purposes, involving the selection of partners and often complex courtship behaviors.
Natural Selection
A process in evolutionary biology where organisms better adapted to their environment tend to survive and produce more offspring, driving the evolution of species.
Sharp Hearing
The ability to perceive and distinguish sounds with greater accuracy and sensitivity than average.
Webbed Feet
A characteristic of some animals where the toes are connected by a membrane, aiding in swimming.
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