Organisms having 'pores' all over the body and a canal system for bringing in food and oxygen belong to the phylum:

State the type of body cavity found in Platyhelminthes. Write whether they are parasitic or free-living.

Enlist four main features of organisms placed in the kingdom Protista.

Fill in the blanks:
$(a)$ Fungi shows .............. mode of nutrition.
$(b)$ Cell wall of fungi is made up of ..............
$(c)$ Association between blue-green algae and fungi is called as ..............
$(d)$ Chemical nature of chitin is ..............
$(e)$ .............. has the smallest number of organisms with the maximum number of similar characters.
$(f)$ Plants without well-differentiated stem,root,and leaf are kept in ..............
$(g)$ .............. are called as amphibians of the plant kingdom.

Which of the following features is not a characteristic of $Protochordata$?

To which class of Animalia does the housefly belong? Mention any three characteristic features of this class of animals. Give two other examples of this class of animals.