Which of these would best describe why cells had to evolve to contain a nucleus before more complex, multicellular organisms could develop? a) without a nucleus, early cells did not have the ability to reproduce b) a nucleus allowed organisms to make necessary proteins and regulate homeostasis c) a nucleus had to evolve to hold the dna as simpler organisms did not contain dna d) the nucleus contained the genetic material is one location which made it more efficient to control cellular functions

The correct answer is D) The nucleus contained the genetic material is one location which made it more efficient to control cellular functions.

Cells had to evolve to possess a nucleus before more complex multicellular organisms could develop. This nucleus is a specialized organelle that is present in the eukaryotic cells. It houses the genetic material, which is the blue print of all life forms.

By possessing a specialized compartment by the cell, all the cellular functions are controlled efficiently ( like DNA replication, Transcription) that further serve essential task to the living system.

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)