Chordate Zoology -MCQ-01
General account and comparative anatomyMULTIPLE CHOICE QUESTIONS
I . Introducing Chordata
1. Animal kingdom has............ major sub kingdoms.
a. four
b. two
C. five
d. three.
2. Chordates have............. primary characters
a. two
b. three
c. four
d. five.
3. Chordates are........symmetrical.
a. bilaterally
b. unilaterally
c. antero-posteriorly
d. dorso-laterally.
4. Chordates are
a. monoblastic
b. diploblastic
C. triploblastic
5. Notochord is derived from the
a. ventral wall of the embryonic gut
b. dorsal wall of embryonic gut
C. ventral wall of pericardium
d. dorsal wall of the pericardium.
6. In vertebrates, the part of the notochord in the head becomes incorporated in the
a. floor of the skull
b. root of the skull
c. lateral part of the skull.
7. The fate of the notochord in all the adult vertebrates is
a. same
b. variable
c. it is same as in larvae in all vertebrates.
8. Endostyle secretes a juice which spreads over
a. the inside of pharyngeal wall,
b. outside the wall,
c. the intestinal wall.
9. Protochordates are the (see which is wrong)
a.filter feeders
b. have notochord,
c. have pharynx,
d. organisms are immobile.
10. Neck is the narrow extension of ....
a. head
b. trunk
c. tail
d. none of those
x x
11. Chordates have.....type of circulatory system.
a. open
b. closed
c. both open and closed
12. Sinuses in vertebrates are the enlargements of ....
a. arteries
b. veins
C. heart
13. Nerves in vertebrates arise from the...
a. dorsal root
b. ventral nerve root
c. dorsal or ventral nerve roots ,
14. In vertebrates eyes are derived from...
a. skin
b. brain
C. nose
d. ear
15. Chordates are...
a. acoelomate mesozoa,
b. acoelomate metazoa,
c. coelomate metazoa,
d. coelomate mesozoa.
16. In agnatha as many as.....pouches and gills are present.
a.5
b. 15
c. 25
d. 35
17. In jawed vertebrates, the maximum number of pouches is
a. two
b. three
C. four
d. seven
18. In urodeles one of the.... slits is retained throughout the life.
a. two
b. three
c. four
d. five
19. The first pharyngeal pouch in tetrapods becomes the..
a. eye
b. auditory tube
c. middle ear cavity
d. auditory tube and middle ear cavity
20. Which of the following is not a basic component of gill arch?
a. Supportive skeletal element
b. Non-striated muscle
c. Branches of the cranial nerves
d. Aortic arch
x x
21. In which of the following groups of animals during the process of neurulation the surface ectoderm does not proliferate a wedge shaped neural keel which eventually separates from surface ?
a. Cyclostomes
b. Ganoid fishes
c. Teleosts
d. Urodeles
22. Neck is absent in...
a. amphibians
b. reptiles
c. birds
d. mammals
23. Calcichordates fall between..
a. arthropods & echinoderms
b. hemichordates & urochordates
c. echinoderms& chordates
d. protochordates & cephalochordates
24. In Urochordates, the coelom is represented by...
a notochord
b. neural lube
c. pericardium
d. gonads
25. In Cephalochordates, the muscles contain a protein called...
a. eumyosin
b. tropomyosin
c. paramyosin
d. photomyosin
26. Which one of the following characteristics is wrongly fitted in relationship between echinoderms and chordates ?
a. Equipotential nature of egg
b. Mesodermal skeleton
c. Larval similarity
d. Bilateral cleavage
27. The hemichordates resemble the lower chordates in having (which is wrong)
a. subepidermal nerve net
b. tripartite coelomic devision
c. ciliated larvae
d. non-ciliated larvae
28. The phosphoarginine that reforms ATP by breakdown in echinoderms is replaced in cephalochordates and vertebrates by
a. phosphoalanine
b. phosphocreatinin
c. phosphogelatin
d. phosphokinin
29. The Osteichthyes are...
a. the cartilaginous fishes including the sharks
b. the bony fishes including the bichirs
c. the armoured fishes that are extinct now
d. none of these
30. With hemichordates, section of other animals are claiming their inclusion in the chordate. These are
a. Cnidarians
b. Pogonophorans
c. Bryozoans
d. Endoprocts
x x
31. That the chordates originated from cornuates has been suggested by
a. Jefferies
b. Richardson
c. Linnaeus
d. Korenberg
32. Probably the chordate ancestors were primitive stalked echinoderms has recently been (1983) felt by
a. Northcult and Gans
b. Goldsmith and Richardson
c. Jefferie and Nicholson
d. Nicholson and Richardson
33. The oldest vertebrates in knowledge are the...
a. Ostracoderms
b. Agnathans
c. Anurans
d. Placoderms
Division A- Protocordata
2. Calcichordata
1. The term calcichordate has been given by
a. Richard Jefferie
b. Richard Nicholson
c. John Major
d. Lancaster
2. A few thousand calcichordates have been divided into
a. 35 species
b. 50 species
c. 70 species
d. 100 species
3. The Mitrates are more or less symmetrical and began to look something like a vertebrate about
a. 28 million years ago
b. 38 million years ago.
c. 48 million years ago
d. 58 million years ago
4. Cothurnocystis is so named because its..... is shaped like a boat
a. head
b. body
c. tail
d. foot
5. Cothurnocystis elizae came from ....
a. upper Ordovician sediments
b. lower Ordovician sediments
c. upper Permian sediments
d. lower Permian sediments
x x
6. The Cothurnocystis use to live ..
a. vertically on the sea floor
b. flat on the sea floor
c. both vertically and flat on the sea floor
d. none of these
7. In the roof of the head on the left side of Cothurnocystis, only the number of openings was...
a. 6
b. 16
c. 26
d. 36
8. The genetic heritage of Cothurnocystis has apparently survived in ....
a. Balanoglossus
b. Amphioxus
c. Urochordates
d. Mitrocystella
9. The brain of Mitrocystella was...
a. not highly developed
b.non fish like
c. highly developed & fish like
d. highly developed but not fish like
10. Beneath the skeleton of Mitrocystella there was/were...
a. one eye
b. two eyes
c. three eyes
d. multiple eyes
3. Urochordata (Tunicate)
1. Branchiostoma is a fish like about....
a. 4-5 mm long
b. 4-5 cm long
c.10-15 cm long
d. 10-15 m long
2. The country in which Branchiostoma is abundantly found and used as food is..
a. America
b. India
c. Japan
d. China
3. Branchiostoma is essentially a burrowing animal, though it can swim freely in...
a. shallow fresh water
b. deep fresh water
c. shallow marine water
d. deep marine water
4. The posterior end of Branchiostoma is long and tapering and the anterior end is...
a. rectangular
b. rounded
c. squarish
d. blunt
x x
5. The epidermis of lancelet is...
a. very thin and composed of simple layer of cubical epithelial cells
b. very thin and composed of single layer of columnar epithelial cells
c. very thick and composed of many layers of cubical epithelial cells
d. very thick and composed of many layers of columnar epithelial cells
6. The muscles in lancelet are divided up into a series of sequential blocks called myotomes by....
a. loose partitions
b. tough partitions
c. simple membranes
d. No particular structure
7. Which one of the following structures does not make the skeleton of lancelet ?
a. Notochord
b. The fibrous cutes
c. Endostyle
d. Myocommata
8. The structure that serves as a stuff keel that helps lancelet pushing the sand ahead during burrowing is...
a. notochord
b. epidermis
c. fibrous cutis
d. myomeres
9. The structure beneath the epidermis and a similar layer beneath the peritoneum that goes round the body and structures to form a sort of neural canal and neural spine is...
a. myotome
b. myocommata
c. notochord
d. fibrous layer
10. The skeleton of gill slits and endostyle in lancelet consists of ...
a solid material
b. gelatinous material
c. watery material
d. vacuolar material
11. The lancelet swims about its axis.
a spirally
b. vertically
c. longitudinally
d. horizontally
12. In lancelet the lateral margins of oral hood are beset with......sensory oral cirri.
a. 10-11 pairs
b. 20-21 pairs
c. 20-31 pairs
d. 40-41 pairs
13. During feeding, the oral cirri turn
a. inward
b. outward
c. both inward & outward
d. No movement
14. Stomodacum in lancelet leads into the pharynx through a small opening, the...
a. duodenum
b. oesophagus
c. enterostome
d. pleurostome one is wrong)
x x
15. Primary and secondary gill bars which
a. differ in their skeletal rods
b. have different origin
c. have similar skeleton
d. have similar origin
16. Gill slits after their formation in lancelet.
a. do open to the outside
b. do not open to the outside
c. do not open to the atrial cavity
d. none of these
17. In lancelet, all along the floor of the pharynx runs the...
a. endostyle
b. notochord
c. spinal chord
d. neural spine
18. The endostyle in lancelet has a pharyngeal face consisting of...
a. 2 columns of ciliated cells
b. 3 columns of ciliated cells
c. 4 columns of ciliated cells
d. 5 columns of ciliated cells
19. The endostyle of lancelet has been shown to concentrate
a. sodium
b. potassium
c. nitrogen
d. iodine
20. Midgut in lancelet should be called ..
a. pharynx
b. intestine
c. stomach
d. rectum
21. Lateral ciliary tract on the left side alone is present in lancelet in....
a. the anterior part of midgut
b. the posterior part of midgut
c. the anterior part of hindgut
d. the posterior part of hind gut.
22. During embryonic development, the metapleural folds in lancelet unite on the ventral side by a transverse shelf called
a. stomach
b. myocommata
c. epipleur
d. metapleur
x x
23. The lancelet is...
a. filter feeder
b. tube feeder
c. chewer feeder
d. sucker feeder
24. Digestion in the hindgut of lancelet is..
a. intracellular
b. extracellular
C. intercellular
d. both inter and intracellular
25. The blood in lancelet is...
a. coloured and without corpuscles
b. colourless and without corpuscles
c. colourless and with corpuscles
d. coloured with corpuscles
26. The number of protonephridia in lancelet is...
a. 50-60
b. 60-80
c. 90-100
d. 120-160
27. Nephridiopore lies against a ...
a. primary gill bar
b. secondary gill bar
c. atriopore
d. neuropore
28. A hollow nerve tube runs the length of the body dorsal to the...
a. coelom
b. notochord
c. nephridium
d. none of the above
29. A dorsal diverticulum of the brain is known as...
a. cerebral vesicle
b. cerebral tube
C. cerebral cavity
d. cerebro-coelom
30. The dorsal and ventral roots of nerves.
a. do not unite
b. do unite
c. may or may not unite
d. none of the above
31. Which of the following is not the feature of nervous system of lancelet
a. a brain is well differentiated
b. dorsal and ventral nerve roots do not form C. nerve fibres do not have myelin sheath
d. cell bodies of the dorsal sensory fibres are not grouped into ganglia
32. The melanocyte in lancelet is present in
a. skin
b. eye spot
c. cerebral vesicle
d. notochord
33. Infundibular organ is a small depression on the floor of the..
a. cerebral vesicle
b. ocelli
c. notochord
d. gonads
34. Sensory papillae are scattered regularly are the..
a. oral cirri
b. cerebral vesicle
C. fibrous cutis
d. eye spot
35. The number of gonads in mature specimen is ...
a.20
b. 22
c. 23
d. 26
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