Which of the following best demonstrates the principle of complementarity of structure and function? a. Bones can support and protect body organs because they contain hard mineral deposits. b. The heart and blood vessels circulate blood continuously to carry oxygen and nutrients to all body cells. c. The liver, brain, blood vessels, and stomach are each responsible for a necessary activity that no other organ can perform. d. Atoms, the tiny building blocks of matter, combine to form molecules such as water and proteins.

Answer is A!

Bones can support and protect body organs because they contain hard mineral deposits.

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)