Which of the following worm cause severe itching of the anus, inflammation of the mucus membrane and appendix?
a) Ascaris lumbricoides
b) Enterobius vermicularis
c) Taenia saginata
d) Fasciola hepatica
The word mollusca is derived from a Latin word “molluscus” which means…
a) hard
b) soft
c) shell
d) calcareous
Explanation: the body of mollusks are soft and are often protected by calcareous shells
Which of the following is the second largest phylum of invertebrates?
a) porifera
b) platyhelminthes
c) echinodermata
d) mollusca
Explanation: it having more than 80000 species with 35000 fossils forms. Largest is phylum Arthropoda with 280000 species
Which of the following are true about molluscs?
a) soft bodied, triploblastic with bilateral symmetry and pseudocoelomates
b) soft bodied, diploblastic with bilateral symmetry and coelomates
c) soft bodied, triploblastic with bilateral symmetry and coelomates
d) hard bodied, diploblastic with radial symmetry and acoelomates
Most of the molluscs are protected by calcium carbonate shell secreted by…..
a) ectoderm
b) endoderm
c) mantle
d) mesoderm
Explanation: body is covered by a tough, fleshy membrane called mantle
Which of the following have the rasping tongue radula?
a) molluscs
b) platyhelminthes
c) echinoderms
d) chordates
