1. Which sentence best states the central idea of the text?
A. Millions upon millions of passenger pigeons once flew in flocks over the
North American continent.
B. The passenger pigeon's behavioral habit of living in huge flocks will
prevent it from being brought back to fly on Earth again.
C. It took humans and their technology to kill billions of passenger pigeons in
order to use them for food.
D. Humans caused the extinction of the passenger pigeon, but scientists are
attempting to bring it back through cloning.

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)

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.