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NAT II Biological Science Zoology MCQs With Answers
Question # 1
A distinctive feature of members of the class Polychaeta is
Choose an answer
Parapodia.
Clitellum.
Annuli.
Absence of setae.
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Question # 2
Which of the following is true of the visceral mass of a mollusc?
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It contains the gills
It secretes the shell
It is used in locomotion
It contains gonads and digestive glands
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Question # 3
Acanthocephalans are also known as spiny-headed worms because of their spiny
Choose an answer
True
False
none of the above
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Question # 4
Most marine protozoa have solute concentration ------------ to that of their environment
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Hypertonic
Hypotonic
similar
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Question # 5
Which of the following is not a common feature of aschelminth?
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incomplete digestive tract
a muscular pharynx
constant cell numbers (eutely)
adhesive glands
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Question # 6
In Schizogony ----------- divisions takes place in mature individual
Choose an answer
Mitotic
Meiotic
Multiple mitotic
First mitotic then meiotic
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Question # 7
Which of the following is not true with respect to nematode reproduction?
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Most nematodes are dioecious
Most nematodes are dimorphic
Males are larger than the females
Gonads lie free in the pseudocoelom.
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Question # 8
Except ---------------- all are the members of class Lobosea
Choose an answer
Arcella
Ameoba proteus
polystomella
Difflugia
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Question # 9
The aschelminths are seven phyla grouped only for convenience.
Choose an answer
True
False
none of the above
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Question # 10
A distinctive feature of members of the subclass Hirudinea is
Choose an answer
Parapodia.
Tentacles.
Anterior and Posterior suckers.
Palps.
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Question # 11
Schizogony means
Choose an answer
to emit
to join
to split
None of above
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Question # 12
--------------- is a developmental process that occurs in gastropods and results in a 180 degree counterclockwise twisting of the visceral mass and mantle cavity
Choose an answer
Gastrulation
Epiboly
Involution
Torsion
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Question # 13
Number of the phylum Nematomorpha are commonly called the ------------- worms.
Choose an answer
horsehair
Gordian
round
both a and b are correct
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Question # 14
Molluscs can be characterized by:
Choose an answer
Trochophore larvae, and they are deuterostomes.
Planaria larvae, and they are protostomes.
Trochophore larvae and they are protostomes.
Planaria larvae, and they are deuterostomes
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Question # 15
A ----------- is a developmental stage of a freshwater bivalve that is parasitic on fishes
Choose an answer
veliger
Kinorhynchs.
Acanthocephalans.
Nemerteans.
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Question # 16
Most polychaetes are
Choose an answer
Monoecious.
Dioecious.
Protandric.
Asexual.
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Question # 17
As protozoa are small, they have --------- surface area in proportion to their volume
Choose an answer
less
Large
Both A and B
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Question # 18
A regular arrangement of microtubules called --------- underlies the plasma membrane of many protozoa
Choose an answer
Pellicle
mesosomes
peroxisomes
Both A and B are correct
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Question # 19
Of the following, which is the most recently described pseudocoelomate animal phylum?
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Pariapulida
Acanthocephala
Loricifera
Nematomorpha
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Question # 20
------------ depict a sequence in the origion of derived characters
Choose an answer
Cladogram
Monogram
Phylogenetic tree
None of above
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Question # 21
The absence of a shell in the aplacophora is a primitive character in the phylum Mollusca
Choose an answer
True
False
None of Above
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