Biology Vocabulary Crossword

6. A relationship in which two species live closely together.
8. A group of organisms that are closely related and can mate to produce fertile offspring.
12. This system circulates blood through the body, delivering hormones, oxygen, waste products, and nutrients where they need to go.
13. An organism that feeds on dead organic material, such as earthworms, millipedes, dung beetles, fiddler crabs and sea cucumbers
14. This person likes crossword puzzles.
17. A community of organisms and their abiotic environment.
20. An interaction in which one organism kills another for food.
21. This era goes by the nickname “Age of Mammals”
22. This era goes by the following nicknames: "Age of Trilobites", "Age of Fishes", "Age of Amphibians", and "Age of the Cockroaches"

1. This body system takes in oxygen from the air and gets rid of carbon dioxide from the blood.
2. This body system breaks down and absorbs nutrients from food.
3. An organism's particular role in an ecosystem, or how it makes its living.
4. An interaction in which an herbivore eats parts of a plant.
5. This body system is made of fibers that contract, allowing for movement.
7. This era goes by the nickname “Age of Reptiles” or “Age of Dinosaurs”
9. The branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
10. An animal that feeds on carrion
11. A symbiotic relationship between two species in which both species benefit.
15. Describes how different species can affect the adaptations of the other, such as the relationship between flowers and bees or Squirrels and Oak Trees
16. A symbiotic relationship in which one organism benefits and the other is neither helped nor harmed.
18. Interaction among organisms that try to get the same resource in an ecosystem.
19. This body system supports, protects, and is used for locomotion and mineral reserves.
20. A symbiotic relationship in which one organism benefits at the expense of another organism.