NAT II Biological Science Zoology With Answers

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NAT II Biological Science Zoology

Sr. # Questions Answers Choice
1 The Gastropoda and the Cephalopoda form a clade characterized by a dorsoventrally elongate body and shell coiling. True False None of Above
2 The operculum aids in both respiration and reproduction in gastropods True False None of Above
3 Labial palps of bivalves sort filtered food particles delivered by cilia lining the ventral margin of the gills. True False None of Above
4 Members of the class Monoplacophora are wormlike molluscs that lack a shell, crystalline style, and foot; they live in vertical burrows on the deep-sea floor. True False None of Above
5 Members of the class Polyplacophora include the chitons, which are found on hard substrates in marine habitats. True False None of above
6 Cephalopods rely on olfactory senses for detecting prey True False None of above
7 A ------------- is a mucoid mass that extends to the stomach of gastropods. It contains trapped food particles and is rotated by cilia Protostyle Umbo Crystalline style Gastric shield
8 --------------- is a developmental process that occurs in gastropods and results in a 180 degree counterclockwise twisting of the visceral mass and mantle cavity Gastrulation Epiboly Involution Torsion
9 Members of which of the following mollusc classes would be characterized by a reduced head, a mantle that surrounds the entire body and a tusk-shaped shell? Scaphopoda Bivalvia Polyplacophora Gastropoda
10 Members of which of the following mollusc classed would be characterized by a shell consisting of 8 plates? Aplacophora Polyplacophora Monoplacophora Cephalopoda
11 All of the following mollusc characters would be found in a member of the class Bivalvia except one. Select the exception. Visceral mass head-foot mantle cavity radula
12 Molluscs can be characterized by: Trochophore larvae, and they are deuterostomes. Planaria larvae, and they are protostomes. Trochophore larvae and they are protostomes. Planaria larvae, and they are deuterostomes
13 Which of the following is true of the visceral mass of a mollusc? It contains the gills It secretes the shell It is used in locomotion It contains gonads and digestive glands
14 The molluscs are most closely related to the Annelids Enhinoderms Arthropods. Chordates
15 Which of the following is true of the mantel cavity of a bivalve? It is the area where water circulates during feeding and gas exchange It is the space between the mantle and the shell It is the space between the pericardium and the heart It is the space where blood circulates before being returned to the heart
16 The mantle of most mollusks is modified for locomotion is used in attracting prey secretes the shell supports the radula
17 Which of the following is true of the radula of most molluscs? It is used in reproduction It is used in excretion It is used in rasping food It is used in gas exchange
18 All the following are unique to the molluscs except one. Select the exception. mantle shell visceral mass head-foot
19 All the following characteristics are present in Dephnia except Carapace covers thorax One pair of compoynd eyes Presence of parapodia Eight pairs of thoracic appendages
20 Presence of metameric segmentation Lumbricus Daphnia Arenicola Both A and C are correct
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