REPUBLIC OF CAMEROON THE UNIVERSITY OF BAMENDA

Peace-Work-Fatherland

P. O. BOX 39 Bambili

School/Faculty: _SCIENCE___ Department:_Biological Sciences Lecturer(s): Mr

Gangue T, Dr Yana W, and Dr Ebanga Echi J. Course Code: _ZOOS2202_______

Course Title: Vertebrates zoology Date: _10/07/2018_______Halls: _PBB08 & PBB05

________Time: 2:30-5:30

Instructions: Answer all questions

Craniata; c) Tunicata, Protochordata and Cephalochordata.

4. Craniata have: a) more species than Insecta; b) equal species like Insecta; c) less species than

Insecta.

5.The neural crest is found in: a) all animals; b) Epithelioneurians and Epineurians, c) Chordates; d)

Vertebrates.

6. Cephalochordata group organisms with notochord visible at: a) at the larval and adult stages; b) the

posterior part of the larval stage; c) the posterior part of the adult stage; d) anterior part of body.

7. The first importance of vertebrates is due to: a) its diversity; b) its number; c) the size of its

members.

8. Hagfishes a) have paired appendages; b) are scavengers; c) have 7 gill openings; d) are mostly

10) a) Acanthodii, b) Chondrichthyes, c) Osteichthyes

11) a) Cladoselachii, b) Selachii, c) Antiarchi, d)Bradyodonti, e) Holocephali

12) a) Diphycercal, b) monocercal, c) heterocercal, d) homocercal

III-From Agnatha to Gnatosthomata, which organ evolved to give what? 2 marks

IV. Give the scientific importance and an example of Dipneusti. 2 marks

V.Which part of the brain of Pisces is the most developed? Give the consequence at the level, of their

aptitude.

VI-Evolution of reproduction within Pisces, (in no more than 6 lines)

more evolved fishes. Give the name of the more evolved group of fishes and the main character which

distinguishes them from other fish group. (3+1+1=5 marks)

1. Give the main criteria which allow zoologists to subdivide Reptilia class in subclasses. (2 marks)

2. Give the major element that distinguishes the reptiles, birds, and mammals from other vertebrates.

(2 marks)

3. Define the term metamorphosis and in which group of vertebrate metamorphosis occurs? (1+1=2

marks)

4. Define the term paedomorphosis, in which group of animals paedomorphosis occurs. According to

you what is the cause of paedomorphosis? How you can solve the paedomorphosis problem in these

animals? (l+l+2+2=6 marks)

2. Birds that are active immediately after hatching are known as: a-Altricial; b-Precocial;c-Cambered

d-Polygynous.

3, Along with an ability to sense the earth’s magnetic field, birds also find their way during migration

by: a- Olfactory cues; b-Auditory cues; c-Visual cues; d-Tactile cues.

4. Which of the following is the correct sequence of events in bird reproduction? a-fertilization,

addition of albumin, formation of shell; b-formation of shell, addition of albumin, fertilization; c-

fertilisation, formation of shell, addition of albumin; d-addition of albumin, fertilization, formation of

shell.

5. Most birds practice seasonal -------- due to the necessity of caring for the young: a-polyandry; b-

monogamy; c- polygyny; d-polygamy.

9. Which of the following is a defining characteristic of mammals? a-maintain a constant body

temperature above that of their surroundings; b-their young are born alive; c-they suckle their young;

d-they have four limbs.

10. Which of the following statements about hair is true? a-It is homologous to feathers; b-lt is a

dermal structure; c-It is found in all mammals ; d-It is possessed by all endotherms.

11. Like reptiles and birds, mammals have --------- kidneys: a-mesonephric; b-aglomerular; c-

metanephric; d-unpaired.

12-Hair, horns, and nails are composed of: a-carotenes; b-keratin; c-cerumen; d-colostrum.

13. The functions of the vibrissae is for- a-colouration ; b-insulation; c-protection against wear; d-

sensation.

bronchi; c-alveoli; d-bronchioles.

19. In thoracic breathing, inhalation is the result of: a-contracting internal intercostal muscles; b-

contracting external intercostal muscles; c-contracting muscles attached to the sternum; d-relaxation.

20. Mammals can live anywhere and be successful because they are: a-ectotherms; b-endotherms ; c-

placental; d-marsupials.

21 -Large mammals usually have how many offspring at a time: a-3; b-5; c-many; d-1.

22. Hibernation is a winter period of inactivity in which: a-there is shivering thermogenesis; b-

mammals dissipate excess heat; c-the hypothalamus of the brain slows the metabolic, heart and

respiratory rates ; d- none of the above.

23. Pheromones secreted by mammals are used for all except: a-recognise members of the opposite

aestivation; b- menstruation; c-embryonic diapauses; d-hibernation.

26. The following are advantages of embryonic diapauses: a-it allows the mother to give birth and

mate within a short time; b-it allows young to be born at a time when resources favour their survival;

c-it ensures that an animal can hibernate during pregnancy; d-a,b,c are correct.

27. All of the following except ….is important for mammalian communication: a-visual cues; b-

pheromones; c-auditory and tactile cues d-migration.

28. The main nitrogenous waste of mammalian is .. a-amonia; b-urea; c-uric acid; d-ketones.

29. The highest order of Class Mammalia is: a-Order Carnivora; b-Order Rodentia; c-Order Primates;

d-Order Proscidea.

30. In ruminant herbivorous mammals, the order of the arrangement of the stomach is: a-rumen,