Animal Survival Crossword

A behavior used by animals to identify their territory.
The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
A change or the process of change by which an organism or species becomes better suited to its environment.
A substance that is capable of causing the illness or death of a living organism when introduced or absorbed.
The series of changes in the life of an organism, including reproduction.
The state or fact of continuing to live or exist, typically in spite of an accident, ordeal, or difficult circumstances.
A hierarchical series of organism search dependent on the next as a source of food in order to survive.
Protect or shield from something harmful, especially bad weather.
A person or thing that prevents someone or something from suffering harm or injury.
Gives chase to fleeing prey.