Which
of the following is included in subkingdom parazoa?
a) porifera
b) platyhelminthes
c) echinodermata
d) chordata
Explanation: porifera word derived from ‘porus’ meaning minute holes, called ostia
Which of the following is/are missing in phylum porifera?
a) multicellularity
b) true tissue
c) organs
d) both b and c
Explanation: these animals are commonly known as ‘sponges’
Which of the following is/are true about the sponges (porifera)?
a) primitive metazoans
b) all members are aquatic mostly marine
c) both a and b
d) none of them
Body of porifera is tubular which opened at its anterior end called………..
a) anus
b) osculum
c) spongocoel
d) ostia
The cavity present in the body of porifera is called……
a) mesoglea
b) spongoocoel
c) pleura
d) pinacoderm
The walls of bodies of animals belonging to phylum porifera are made up of…….. layers.
a) two
b) three
c) four
d) five
Explanation: 1. The Outer layer and
2. The inner layer
