Invertebrate Zoology (ZOOS2101)
Biological Science - BS
Semester: First Semester
Level: 200
Year: 2015
REPUBLIC OF CAMEROON THE UNIVERSITY OF BAMENDA
Peace-Work-Fatherland P. O. BOX 39 Bambili
School/Faculty: _SCIENCE____________ Department:_Biological Sciences
Lecturer(s): _Dr Yana W, Mr Tofel H.K and Mrs Ebanga C.J._________
Course Code: _ZOOS2101_______ Course Title: Invertebrates Zoology
Date: _26/02/15_______Halls: __Asanji and Amphi 340________Time: 7:30-
10:30__ Instructions:__ANSWER ALL
QUESTIONS____________________________
Part 1 (20 marks)
1- Definition: Spicule, tripomastigote, mesoglea, Parazoas. (4 marks) '
2- Describe the sexual phase of Plasmodium falciparum. (4 marks)
3- Draw and label Trichomonas vaginalis. (2 marks)
4- State the four (4) classes of the phylum Cnidaria. (4 marks)
5- Draw and label the medusoid form of Cnidarian. (2 marks)
6- Give two (2) main differences between the classes Calcarea and Hexactinellida
in Sporo Sporozoa.' (2 marks)
7- Give the ecological importance of coral reefs. (2 marks)
NB: The candidate is free to answer in French or English but not in both languages.
Precision and concision will be highly-appreciated
Part 2 (20 marks)
1- The feeding apparatus in Rotifers is known as,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,( 0.5mk)
2- Two characteristics Rotifers share with Platyhelminths are and (lmk)
3- The phylum Platyhelminthes is divided into 4 classes namely-,-,- an- (2mk)
4-Monogenetic flukes are so named because they have-——generation in their life
cycle (0.5mk)
5-Monogeneans use …as an attachment organ and their eggs hatch into—larva (lmk)
6-Nematodes are grouped into two classes based on the
presence or absence of-(0.5mk)
7- Earthworms are amongst the most defendless of creatures, yet their abundance and
wide distribution. Explain (4m ks)
8-Describe how reproduction occurs in earthworms (5 mks)
9- Explain why:
a- Nematodes do not crawl and state how they move (1 mk)
b- Nematodes are a successful group of animals (3.5mks)
10- What is tagmatization? (lmk)
Part 3 (30 marks
A-Define the following terms: parasitoici, osphradia, pygidium, cipinnaria larva, dextral
shell. 2.5 marks;
B-instructions for multiple choice questions (15 marks): Right answer = 1 mark; Wrong
answer = - 0.5 mark; no answer = 0 mark. Write only the letter corresponding to the true
answer.
1-Rhinophores are: a) the modified tentacles of male mollusks used for copulation, b)
the modified tentacles of mollusks which increase the area for chemoreception; c) the
modified tentacles of mollusks responsible of sensory function.
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2. The direction of the gastropods coiling process is under a) hormonal control b)
environmental control c) genetical control d) genetical and hormonal control
3. The outer layer of mollusk shell is called: a)
epiculticle; b) prismatic layer; c)
periostratum; d) procuticle
4. During the embryonic development of arthropods, the hemocoel is formed during:
a)blastulation stage b)gastrulation stage; c)segmentation stage d)hemolymp-genesis
stage
5. The subesophageal ganglion of crustaceans supplies nerves to: a) mouth, eyes, and
esophagus; b) no appendages, esophagus, and antennal gland; c}: mouth, appendages,
esophagus, and antennal gland
6. The function of crustacean maxillipeds is: a)to ingest food; b) to hold and crush food;
c) to capture and food
7- Mechanical stimuli of insects are involved for: a) touch, pressure and vibration; b)
taste, pressure vibration; c) touch, smell and vibration
8- The ticks are: a) always permanent ectoparasites; b) not permanent ectoparasites; c)
sometimes permanent ectoparasites d) both permanent and periodic ectoparasites;
9- The scorpion prosoma bears:- a) three pairs of walking legs; b) five pairs of walking
legs; c) six pairs Walking legs; d) four pairs of walking legs.
10. The excretory organs of spider are: a) malpighian tubules; b) coxal glands or
nephridia;- c) coxal gland e) malpighian tubules or coxal glands.
11. The female spiders lay their eggs in: a) abdominal cavity; b) silken net called
cocoon; c) soil or sane substratum
12- The procuticle of arthropod exoskeleton is composed by: a) chitin bound- with
proteins; b) calc carbonate; c) lipoproteins; d) chitin and calcium carbonate.
13-The hindgut of insect digestive tract is composed of: a)intestine and amts; b)stomach
and intestine c) esophagus, stomach and intestine; d) intestine, rectum, and anus.
14- The female myriapods lay their eggs in: a) abdominal cavity; b) silken net called
cocoon; c) soil or sand substratum
15- The larger oral stomach of echinoderms is
-
baited: a) cardiac stomach; b) pyloric
stomach; c) cardio-pylo stomach.
C-Identify the intruder of the following lists (write only the name of the intruder) 2,5
marks:
1- SnaiL, scallop, limpet, slug, and abalone.
2- Shrimps, crabs, lobsters, and Cyclops
3- Protura, Diplura, Collembola, and Odonata.
4- Cyclops,barnacles, brills, octopuses, shrimps; crabs, and lobsters,
5- Gasteroppds, Decapods, Isopods, Myriapods, and Hexapods.
D- Short answer questions:
1- Explain how and why the cephalopods change their body colour? 2.5 marks
2- Give the origin of hemocoel of arthropods. l.5 mark
3- Give theenvironmental factors that coordinate sexual activity of echinoderms. 1 mark
4- Draw and label the digestive system of Insects. 2 marks
5- Copy and Complete the following table: 3 marks
Characters
Animals
Common characters Specific characters.
spider
Crab
Grasshopper
Millipede
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