Coelenterata and Ctenophora MCQ (Multiple Choice Questions and Answers)
Question 1 : The study of coelenterates is known as
A) Arthrology
B) Splanchnology
C) Cnidology
D) Nidology
Answer : C
Question 2 : Which is a fresh water cnidarian
A) Hydra
B) Spongilla
C) Dugesia
D) None of the above
Answer : A
Question 3 : Coelenterates are
A) Diploblastic
B) Triploblastic
C) Monoblastic
D) None of the above
Answer : A
Question 4 : The name Hydra was given by
A) Ellis
B) Aristotle
C) Linnaeus
D) Reaumur
Answer : C
Question 5 : The oral cone of Hydra is called
A) Manubrium
B) Mouth
C) Osculum
D) Ostium
Answer : A
Question 6 : The number of tentacles in Hydra are
A) 6 to 10
B) 10 to 16
C) 16 to 20
D) 20 to 26
Answer : A
Question 7 : Gland cells for secreting adhesive material in Hydra are present in
A) Pedal disc
B) Stomach region
C) Growth region
D) Hypostome
Answer : A
Question 8 : Supporting lamella of Hydra is
A) Mesogloea
B) Gastrodermis
C) Epidermis
D) None of the above
Answer : A
Question 9 : Hydra is immortal, because
A) Old cells are replaced by new cells
B) Cell do not grow old
C) Of regeneration
D) It never dies
Answer : A
Question 10 : Nematoblasts in Hydra are commonly of
A) 2 types
B) 3 types
C) Four types
D) None of the above
Answer : C
Question 11 : What will happen if the cnidocil is touched with a glass rod?
A) Nematoblasts will be damaged
B) Nematoblasts will not discharge
C) Nematoblasts will die
D) None of the above
Answer : A
Question 12 : Nematoblasts with blind thread tube is called
A) Stenotele
B) Desmoneme
C) Stereoline glutinant
D) Streptoline glutinant
Answer : B
Question 13 : Nematocyst is a
A) Cell
B) Group of cell
C) Organ
D) Part of a cell
Answer : D
Question 14 : The smallest cnidoblast in the body of Hydra is
A) Penetrant
B) Volvent
C) Atrichous isorhiza
D) Holotrichous isorhiza
Answer : C
Question 15 : The largest nematoblast is
A) Stenotele
B) Desmoneme
C) Small glutinant
D) Large glutinant
Answer : A
Question 16 : Germ cells of Hydra are
A) Ectodermal
B) Mesodermal
C) Endodermal
D) None of the above
Answer : A
Question 17 : Digestion in Hydra is
A) Intercellular
B) Intracellular
C) Both
D) None
Answer : C
Question 18 : One of the following is a coelenterate
A) Sea Fan
B) Sea Dollar
C) Sea Cucumber
D) Sea Horse
Answer : A
Question 19 : The mesolamella/mesogloea is formed by
A) Epidermis
B) Gastrodermis
C) Epidermis and gastrodermis
D) Mesoderm
Answer : C
Question 20 : Undigested food of Hydra is expelled from
A) Mouth
B) Anus
C) General surface
D) Hypostome
Answer : A
Question 21 : Hydra does not feed on lower animals because
A) They are so small
B) They are distasteful
C) They lack glutathione
D) None of the above
Answer : C
Question 22 : Digestion in the entrance of Hydra starts with
A) Proteolytic enzymes
B) Amylolytic enzymes
C) Lipolytic enzymes
D) None of the above
Answer : A
Question 23 : Perisarc is absent in Hydra because
A) It is fixed
B) It is free swimming
C) Epidermis cannot secrete it
D) None of the above
Answer : B
Question 24 : Great Barrier Reef occurs off the coast of
A) Sri Lanka
B) Philippines
C) Australia
D) Maharashtra
Answer : C
Question 25 : Hydra is
A) Insectivorous
B) Frugivorous
C) Omnivorous
D) Carnivorous
Answer : D
Question 26 : Which part of Hydra is without supporting lamella?
A) Basal disc
B) Central part of pedal disc
C) Tentacles
D) None of the above
Answer : B
Question 27 : Which part of Hydra is without nematoblasts?
A) Pedal disc
B) Tentacles
C) Manubrium
D) Stomach region
Answer : A
Question 28 : In which nematoblast thread tube is unarmed and open at the tip
A) Penetrant
B) Volvent
C) Small glutinant
D) Large glutinant
Answer : C
Question 29 : Tentacles of Hydra are
A) Hollow
B) Solid
C) Half hollow and half solid
D) None of the above
Answer : A
Question 30 : The green colour of Hydra viridis (Chlorohydra viridissima) is due to
A) Chloroplasts
B) Pigment
C) Zoochlorella
D) None of the above
Answer : C
Question 31 : Which nematoblasts coil around the prey?
A) Penetrants
B) Volvents
C) Small glutinants
D) Large glutinants
Answer : B
Question 32 : Nematoblasts responsible for locomotion are
A) Penetrants
B) Volvents
C) Glutinants
D) None of the above
Answer : C
Question 33 : Hypnotoxin is
A) Protein
B) Carbohydrate
C) Lipid
D) None of the above
Answer : A
Question 34 : Fresh Water Polyp is
A) Hydra
B) Aurelia
C) Physalia
D) Obelia
Answer : A
Question 35 : Epitheliomuscular cells of epidermis of Hydra form
A) Circular muscles
B) Oblique muscles
C) Longitudinal muscles
D) None of the above
Answer : C
Question 36 : A colonial hydrozoan is
A) Hydra
B) Metridium
C) Aurelia
D) Obelia
Answer : D
Question 37 : Hydra contracts its body by means of
A) Interstitial cells
B) Cnidoblasts
C) Nutritive cells
D) Epithelio-muscular cells
Answer : D
Question 38 : Sea Anemone is member of class
A) Hydrozoa
B) Scyphozoa
C) Anthozoa/Actinozoa
D) None of the above
Answer : C
Question 39 : Metagenesis is found in
A) Hydra
B) Obelia
C) Aurelia
D) Tubipora
Answer : B
Question 40 : Polymorphic animal is
A) Physalia
B) Hydra
C) Tubipora
D) Metridium
Answer : A
Question 41 : Hydra can digest all types of food except
A) Proteins
B) Fats
C) Starches
D) None of the above
Answer : C
Question 42 : Mesogloea of Hydra contains
A) Nerve cells
B) Phagocytic cells
C) Interstitial cells
D) None of the above
Answer : D
Question 43 : Cnidom is a
A) Battery of a nematoblasts
B) Group of nematoblasts
C) Armed thread
D) Unarmed thread
Answer : B
Question 44 : Larva of Hydra is
A) Absent
B) Planula
C) Tadpole
D) Hydrula
Answer : A
Question 45 : A coral island with a central shallow lake is known as
A) Coral reef
B) Lagoon
C) Atoll
D) Corallite
Answer : C
Question 46 : Gas gland occurs in
A) Gorgonia
B) Physalia
C) Pennatula
D) Red Coral
Answer : B
Question 47 : Chitinous covering or perisarc is present in
A) Obelia
B) Hydra
C) Aurelia
D) Physalia
Answer : A
Question 48 : Blastostyle of Obelia bears
A) Tentacles
B) Polyps
C) Medusae
D) Gonads
Answer : C
Question 49 : Polyps of Obelia are
A) Reproductive zooids
B) Nutritive zooids
C) Zooids meant for dispersal
D) All the above
Answer : B
Question 50 : Pneumatophore is present in
A) Hydra
B) Obelia
C) Aurelia
D) Physalia
Answer : D