1.

Identify the animal with following characteristics: 1. They are very simple. 2. They have porous body. 3. Water flows in and out of the pores. 4. Oxygen and nutrients are absorbed directly through the water.

Answer»

Identify the animal with following characteristics:
1. They are very simple.
2. They have porous body.
3. Water flows in and out of the pores.
4. Oxygen and nutrients are absorbed directly through the water.




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