The nodules that serve as an important habitat for marine life are what?

As explained below.

Explanation:

Marine habitat is divided into coastal and open ocean habitat, the open habitats are found in the deep waters beyond the continental shelves. While the coastal area found in the tidal waters.

Some things that make a good habitat for the marine life are:

1. Temperature

2. Sunlight  

3. Salinity  

4. Nutrients  

5. Turbulence  

Coastal habitat consists of tidal, intertidal, sandy shores, rocky shores, mudflats, mangroves ad salt marshes, estuaries and kelp forests including coral reefs. And the open include surface water and deep seafloor.

False - unicellular organisms like bacteria reproduce using binary fission