Biology 11 Chapter - 9
Diversity Among Animals - 11
1.
The outer dermal layer of sponges is known as?
a) choanoderm
b) pinacoderm
c) mesenchyme
d) blastopore
2.
The middle region in the sponge body is known as?
a) mesenchyme
b) choanoderm
c) choanocyte
d) pinacoderm
3.
The flagellated cells choanocytes form?
a) pinacoderm
b) blastopore
c) mesenchyme
d) choanoderm
4.
The many pores in the body of sponges are called as?
a) spongocoel
b) ostia
c) oscula
d) choanocytes
5.
The body cavity of the poriferans is known as?
a) spongocoel
b) osculum
c) haemocoel
d) ostium
6.
Water enters into the body of sponges through ___ and goes out through ___?
a) osculum, ostia
b) ostia, ostia
c) ostia, osculum
d) osculum, osculum
7.
The spicules in the skeleton of sponges are?
a) none of these
b) both of these
c) calcarious
d) siliceous
8.
The method of asexual reproduction in sponges is?
a) gemmule formation
b) b and c are correct
c) sperms and eggs
d) budding
9.
Which one of the following is Not correct about sponges?
a) they have a larval stage
b) they are all hermaphrodite
c) they may have separate sexes
d) they are aquatic
10.
Euplectella belongs to the phylum?
a) annelida
b) coelentrata
c) porifera
d) molluska
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