Members of phylum porifera are unique among animals because they contain __ distinct tissue layers.

Phylum Porifera contains sponges that have cellular level of organization so the cells in sponges are not organized into specialized tissue, therefore, tissue level of organization is absent in sponges while other animals contain tissue and a higher level of organization.

Therefore, members of Porifera are unique in animals as they contain zero distinct tissue layers due to lack of tissue level of organization.

Sponges contain different cells that performs different function so the cells are specialized in sponges and are organized loosely. Most sponges are asymmetrical and contain pores called Ostia for the passage of water.

the answer is c.) there is a warm front in region a and a stationary front in region b.

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)