The easiest way if the plants are small enough is to wash the soil off and slowly unravel the roots. Some plants are easier to separate than others.
Perhaps. There are water plants however that have roots, stems, and leaves.
Air plants.
Plants roots that are above ground are called aerial roots. Examples are some types of orchids, mangroves, and banyon trees.
Non-vascular plants
I think separate roots
rhizoids
To separate plants that have grown together, carefully dig around the base of each plant to loosen the roots. Gently pull the plants apart, being careful not to damage the roots. Replant each plant in a new location with fresh soil and water thoroughly.
Usually they will either have shallow rots to capture water from rain or deep tap roots to obtain water deeper within the soil. Different plants will often spread their roots at separate depths in order to avoid competition for water
Roots don't have roots, plants have roots.
what would happen to plants nutrition if plants did not have roots
The plants that have fine roots : Kangkong etc.....
Water used in photosynthesis by plants is made available by roots. That is why roots of plants are important to photosynthesis in terrestrial plants. Aqatic plants absorb water from their free surface, hence role of roots in these plants is limited.
Not all plants have roots (eg phytoplankton) and while some plants do grow form their roots (eg grasses), most plants do not grow from their roots but from their apical growing tip.
Roots are an incredibly important element to a great many plants. These plants depend on the roots to suck up water.
Plants roots
The roots.
There are many things a plants roots do for an ecosystem. Plants roots help prevent erosion of soil for example.