Invertebrate Zoology (ZOOS2101)
Biological Science - BS
Semester: First Semester
Level: 200
Year: 2016
REPUBLIC OF CAMEROON THE UNIVERSITY OF BAMENDA
Peace-Work-Fatherland
P. O. BOX 39 Bambili
School/Faculty: _SCIENCE____________ Department:_Biological Sciences
Lecturer(s): _ Yana /Tofel/ Ebanga_________
Course Code: _ZOOS2101_______ Course Title: Invertebrates Zoology
Date: _04/03/16_______Halls: __ A340-PBA07-PBA08________Time: 7:30-10:30__
Instructions:Answer all questions, section by section beginning with any part of your choice.
Part 1 (20 marks)
1- Give and define the heterotrophic feeding forms in Protists. (2, marks)
2- Name the sponge cell types and their functions. (3 marks)
3- In a table, give the intermediate, definitive-hosts and the diseases caused by the followings
protists;
Trypanosoma brucei, Plasmodium falciparum, Amoeba proteus and Patramecium caudaturn. (3
marks)
4- Draw and label a nematocyst (3 marks)
5- Discuss the classification of Poriferans; (3 marks)
6- Mention the characteristics of phylum Microsppra and to which, kingdom belongs this phylum
(2 marks)
7- What is difference, between a cnidae and a cnidocyte? (2 marks)
8- Give an account of nutrition in Cnidarians. ( 2 marks)
Part 1 (20 marks)
1- What is the other name of members of the Phylum Platyhelminthes
2- What is one important characteristic of platyhelminthes?
3- Name one unique characteristic of rotifers
4- How are monogenetic flukes different froth digenetic flukes
5- How do flukes reproduce?—
6- What is the name of the attachment organ used by morogenetic trematodes called?
7- Name the parasitic classes found in the Phylum Platyhelmifithes
8a- Nematodes are classified based on what? (1 maRK)
b- Name the two classes in the phylum Nematoda. ( 2 marks)
c- Male nematodes have a bursa. What is the function of this structure .? ( 1mark)
9- Which group of animals use renette cells for excretion. ? (1 mark)
10a- Why are annelids sometimes called bristle “ worms” . ( 2 marks)
B- how are leeches different from earthworms ? ( 1 mark)
C- What is the use of coelomnores in the body of leeches. ? (1 mark)
D- Give the name of the most widely studied polychaete. ( 1 mark)
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Part 3 ( 30 marks)
A- Instruction for multiple choice questions ( 20 marks) : Right answer – 1 mark, Wrong
answer= -0.5 mark, no answer = 0 mark. Write only the number and the letter corresponding
to the true answer.
1- The shell of mollusks is secreted by : a) epidermis b) mantle; c) exoskeleton d) endoskeleton
2- During development of mollusks we observe: a) radial cleavage b) spiral cleavage c)
meridional cleavage; d) radial and spiral cleavage.
3- Direction of coiling in mollusks group is under : a) hormonal control; b) nervous system
control c) genetic control; d) neurohormonal control .
4- In opisthobranch mollusks group, the area for chemoreception can be increased by: a)
rhinophores; b) chromatophores c) osphradia; d) photoreceptors.
5- The principal sense organ of gastropods is: a) osphradia; b) photoreceptors; c)
chemoreceptors; d) margin of mantle; e) statocysts
6- The specialization of region in arthropod body is called: a) metamerism; b) schlerotization c)
metamorphosis; d) tagmatization e) regionalization.
7- enzymes secreted during ecdysis process derived from: a) epidermal glands; b) digestive
glands c) exoskeletal glands; d) ecdysial glands e) hypodermal glands.
8- The exoskeleton which is the exterior part of arthropod procuticle is secreted: a) after
moulting; b) before moulting c) after the endocuticle d) before the procuticle .
9- The appendages of trilobites were: a) uniremous; b)triramous; c) biramous; d) some
uniramous other biramous
10- Cephalothorax of chalicerate arthropods Usually consists of: a) ten segments; b):three
segments; c) four segments; d) six segments e)eight segments.
11- Arachnids lack a) antenna; b) mandibles; c) chelicerae d) antenna and mandibles; e)
pedipalps.
12- The basal segment of crustacean appendages is called: a) coxopodite; b) exopodite; c)
endopodite; d) epipodite e) protopodite
13-The largest group of crustaceans is: a)Malacostraca class; b) Branchiopoda class; c)
Maxiilopoda- class; d) cephalocarida class; e) Decapoda class
14- The function of crustacean mandible is to; a)-taste food; b) touch food c) crush food; d)
ingest food.
15- The dorsal plate of hexapod somite is called: a) stenium b) pleurum c)miterum; d) scleruni
16-The role of hexapod crop is: a)grinding food b) storage food; c) digesting food; d) crushing
food.
17-The Well developed senses for temperature of insects is located into: a) compound eyes; b)
the cuticle; c) mandibles d)antennae and legs; e) the skin.
18- In myriapod group the number of segment and legs increase with: a) the age of animal; b) the
sex of animal: c) the habitat of animal d)the size of animal.
19- larva obtained after gastrulation of echinoderm is called: a) veliger larva; b) trochophore
larva; c) naupleus larva d) bipinnafia larva; e) brachiolaria larva.
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20- Pentaradial symmetry is specific pattern of: a) echinoderm larva b) echinoderm adult; c)
myriapods;
arthropods; e) mollusks
B- Instructions for short answer questions ( 10 marks). Precision and concision will be highly
appreciated.
1. Describe in one sentence the digestive tract of echinoderms. (1.5 marks)
2. Define and give the function of gonopods in the myriapods group. ( 2 marks)
3. What is the role of the first swimmerets of male crayfish. (1 mark)
4. Give the composition of arthropod haemolymp in one sentence (1 mark)
5- give the origin of insect wings. (1 mark)
6- With a diagram, give the typically structure ( parts) of a sommite cuticle in hexapod group. (
1 mark)
7- Give, define and justify the mode of reproduction of ostracod crustaceans. (1.5 mark)
8- What is the origin and role of nematocysts encountered in opisthobranch gastropod body? ( 1
mark)
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