Cell theory began to develop in 1839, following the research of matthias schleiden and theodor schwann into plant and animal tissues. both the botanist schleiden and the physiologist schwann noticed that every organism they viewed under a microscope, whether plant or animal, was composed of cells. their observations that all living species are made up of one or more cells led to the early formation of cell theory. which tenet of cell theory is described by the paragraph about the historical observations of cells?

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)

links? do you have a link? i don't see anything?