Read the following statements and select the correct option. a. To facilitate more sound and scientific placement of various taxa, taxonomists have also developed subcategories. b. Only a few protozoans are heterotrophs and live as predators or parasites.

Step-by-step solution

Taxonomists have developed subcategories to make the taxonomic position of species more precise and specific categories are added to this list. They are called intermediate categories, e.g., subkingdom, superphylum or superdivision, subdivision, superclass, subclass, superorder, suborder, and superfamily subfamily, tribe, subspecies, variety etc. All protozoans are compulsorily heterotrophic. They derive nutrients from other organisms, by completely ingesting the left out organic remains or waste-products. The prot