NEET BIOLOGY

Detailed explanation-1: -Most protists are microscopic and unicellular, but some true multicellular forms exist (such as in the brown algae, Phaeophyta). A few protists live as colonies that behave in some ways as a group of free-living cells and in other ways as a multicellular organism.

Detailed explanation-2: -Not all protists are microscopic. Some groups have large species indeed; for example, among the brown algal protists some forms may reach a length of 60 metres (197 feet) or more.

Detailed explanation-3: -Most protists are microscopic, unicellular organisms that are abundant in soil, freshwater, brackish, and marine environments. They are also common in the digestive tracts of animals and in the vascular tissues of plants.

Detailed explanation-4: -Protists are eukaryotes, which means their cells have a nucleus and other membrane-bound organelles. Most, but not all, protists are single-celled. Other than these features, they have very little in common. You can think about protists as all eukaryotic organisms that are neither animals, nor plants, nor fungi.

Detailed explanation-5: -In most cases, protists are classified as unicellular. This means that they are made up of a single cell and are microscopic. In contrast, there are multicellular organisms that are made up of multiple cells that work together to function. There are rare cases of Protists that are classified as multicellular.