Zoology CSS Paper I 2001

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS
IN BPS – 17 UNDER THE FEDERAL GOVERNMENT, 2001.

ZOOLOGY, PAPER – I

TIME ALLOWED: THREE HOURS MAXIMUM MARKS:100

NOTE: Attempt FIVE questions in all, including question No. 7 which is COMPULSORY. Select at least TWO QUESTIONS from each of the SECTIONS ‘A’ AND ‘B’. All questions carry EQUAL marks.

SECTION ‘A’

1. (a) Briefly describe four different methods of ASEXUAL REPRODUCTION met in the PROTOZOA. (7)
   (b) Give a brief account of different types of species found in PORIFERA. (7)
   (c) Define POLYMORPHISM. Discuss the phenomenon with reference to order SIPHONOPHORA (COELENTERATA). (6)

2. (a) Write a short essay on affinities of CTENOPHORA. (6)
   (b) Discuss the general adaptation of parasitic mode of life with special reference to phylum PLATYHELMINTHES. (7)
   (c) Give an account of two broad types of NEPHRIDIA found in POLYCHAETA. (7)

3. (a) Define METAMORPHOSIS and discuss the phenomenon with reference to INSECTS. (7)
   (b) Write a short essay on TORSION in GASTROPODS. (7)
   (c) Discuss REGENERATION with special reference to ECHINODERMS. (6)

SECTION ‘B’

1. (a) Discuss the possible origin of the CHORDATES. (7)
   (b) Give a brief account of the evolutionary changes in HEART in different classes of CHORDATES. (7)
   (c) Write a short note on anatomy of the MAMMALIAN KIDNEY. (6)

2. (a) Describe the two basic types of CLEAVAGE with reference to CHORDATES. (7)
   (b) Write an essay on PLACENTATION IN MAMMALS. (6)
   (c) Develop an outline on adaptation of FLIGHT IN BIRDS. (7)

3. Write short notes on the following: (20)
   (a) CAUDAL FINS IN FISH (b) NOTOCHORD (c) VIVIPARITY (d) FEATHERS IN BIRDS

COMPULSORY QUESTION

1. Write only the correct answer in the Answer Book. Do not reproduce the questions.

(A) Which of the four options make the following statement correct? On your answer books just write the question number and one of the serial alphabets.

(1) Insects are characterized by:
(a) 3 pairs of legs (b) Two pairs of antennae (c) Wings on body (d) Large sized eggs (e) None of these

(2) Body is metamerically segmented in:
(a) Porifera (b) Annelida (c) Coelenterata (d) None of these

(3) Which of the following arthropod are totally aquatic?
(a) Crustaceans (b) Insects (c) Millipedes (d) None of these

(4) Dorsal tubular nerve cord is characteristic of:
(a) Some chordates (b) Some non chordates (c) All non chordates (d) All chordates (e) None of these

(5) Opposable thumbs are characteristic feature of:
(a) Lagomorpha (b) Primates (c) Edentata (d) None of these

(6) Differences in the scales of fishes and reptiles lies in their being:
(a) Endodermal and dry (b) Epidermal and dry (c) Epidermal and wet (d) Endodermal and wet (e) None of these

(7) Which of the following has oxygenated blood?
(a) Renal veins (b) Pulmonary veins (c) Pulmonary artery (d) Hepatic portal veins (e) None of these

(8) Scapula is the bone of:
(a) Skull (b) Pelvic girdle (c) Pectoral girdle (d) Vertebral column (e) None of these

(9) All the digestive are formed in vertebrates by:
(a) Ectoderm only (b) Endoderm only (c) Mesoderm only (d) None of these

(10) Ammonia is chief excretory product in
(a) Reptiles (b) Turtles (c) Mammals (d) Fish (e) None of these

(B) Check which of the following statements are true or false. On your answer sheets just write the question number and T or F.

(11) Coelme is lined by ectodermal epithelium
(12) Non-chordates are dissected from dorsal side.
(13) All snakes are poisonous.
(14) Mouth in sharks is located on anterior side.
(15) Frogs have 3 cervical vertebrae.
(16) Contractile vacuole in protozoa is basically an excretory organ.
(17) Nerve cord in chordates is Endodermal in origin.
(18) Whale is the largest mammals living in sea.
(19) Both male and female mosquitoes bite and carry parasites.
(20) The gemmules are produced in coelenterates.