Classification among plants:

(i) The first level of classification depends on whether the plant body has well differentiated, distinct components like root, stem and leaf.

(ii) The next level based on whether the differentiated plant body has special tissues for the transport of water and other substances within it.

(iii)The next level of classification depends on whether the plant bear seeds and seeds are enclosed within fruits.

Mycoplasms are the smallest and the simplest organisms. They belon to the kingdom Monera. They are prokaryotic having nucleoid. Their body can change shape easily. They are heterotrophs.

The examples of protista having
i. Cilia is Paramecium
ii. Flagella is Euglena

Thallophyta are plants that do not have well differentiated body. The plants in this group are commonly called  algae which are predominantly aquatic.