Belonging to the Phylum Annelida, Earthworms are invertebrates. These annelids are usually found inhabiting soil, making it fertile, which is of great economic importance. They have a segmented, long cylindrical body and are hermaphrodites. Earthworms feed on dead organic matter. Explore important MCQs on Earthworm here.
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1. The earthworm is placed under the group
(a) Polychaeta
(b) Hirudinea
(c) Oligochaeta
(d) Crustacea
Answer: (c)
2. The parasite found in the seminal vesicle of earthworms are
(a) Nosema
(b) Sarcocystis
(c) Monocystis
(d) Nyctotherus
Answer: (c)
3. The typhlosole in earthworm is related to
(a) respiration
(b) excretion
(c) absorption
(d) reproduction
Answer: (c)
4. Colour of the body in earthworms is due to the presence of
(a) Haemoglobin
(b) Blood
(c) Porphyrin
(d) Haemocyanin
Answer: (c)
5. Region of earthworm that is a forest of nephridia is
(a) Pharyngeal region
(b) Clitellar region
(c) Typhlosolar region
(d) Intestinal region
Answer: (b)
6. Chloragogen cells are found in
(a) Blood of earthworm
(b) The coelomic fluid of the earthworm
(c) Blood of cockroach
(d) The body wall of leucosolenia
Answer: (b)
7. This animal does not show any metamorphosis of larval stage
(a) Asteria
(b) Musca domestica
(c) Pheretima Posthuma
(d) Butterfly
Answer: (c)
8. The most effective organ for food digestion in earthworm is
(a) Mouth
(b) Buccal cavity
(c) Pharynx
(d) Stomach
Answer: (c)
9. The typhlosole found in Pheretima occurs in
(a) Stomach
(b) Intestine
(c) Oesophagus
(d) Gizzard
Answer: (b)
10. In earthworm, the mouth is located on
(a) Stomium
(b) Peristomium
(c) Prostomium
(d) Protostomium
Answer: (b)
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