EAMCET Zoology – Page 2

1. These are locomotory structures of the protozoans.
A) Pentacronematikc flagellum
B) Reticulopodia
C) Acronematic flagellum
D) Filopudia
Which of the following protozoans possess above mentioned locomotory structures respectively?
1) Urcoelus, Entamoeba, Chilomonas, Actinophrys
2) Urcoelus, Collozoum, Euglena, Amoeba
3) Urcoelus, Globigerina, Chlamydomonas, Englypha.
4) Actinophrys, Monas, Urcoelus, Elphidium.

2. A flagellum may show all of the following types of movements, except:
1) metaboly 2) undular 3) sidewise lash 4) spiral gyration

3. Lateral appendages of flagellum are:
1) singlet and doublet microtubules of the axoneme.
2) radial spokes and dynein arms of the axoneme.
3) flimmers and mastigonemes.
4) basal grannule and rootlets

4. If the lateral appendages and terminal naked axial filament are removed from pantacronematic flagellum, then it would become as:
1) Stichonematic 2) Pantonematic 3) Acronematic 4) Anematic

5. During conjugation of vorticella, new macronuclei in the daughter vorticella, are formed from.
1) micronucleus of macroconjugant directly prior to post conjugation fissions.
2) micronucleus of microconjugant immediately after prezygotic nuclear divisions.
3) migratory pronucleus of macrocongjugant during amphimix is.
4) Synkaryon in the macroconjugant or zygote between the periods of post zygotic nuclear disisions and series of post conjugation
fissions.

6. Multinucleate daughter individuals are formed by coytoplasmic divisions without nuclear division in:
1) Amoeba 2) Vorticella 3) Opalina 4) Acineta

7. Total number of postzygotic nuclear divisions occuring during conjugation of vorticella is:
1)5 2)7 3)6 4)9

8. Which of the following method is responsible for genetic recombination and nuclear reorganization?
1) Plasmotomy 2) Gemmation 3) Multiple Fission 4) Conjugation

9. During conjugation of vorticella, the microconjugant would be formed by the process of:
1) Longitudinal binary fission
2) Transverse binary fission
3) Multiple fission
4) Plasmotomy

10. Undulatory movement of the flagellum from base to the tip results in:
1) Pulling the organism forward
2) Pushing the organism backward
3) Pulling the organism backward
4) Pushing the organism forward

11. Ciliates show:
1) 9+4 organization of microtubules in their cilia.
2) zones of gelation and solation during locomotion.
3) undulatory movements by cilia
4) newromotor system.

12. Match the items of both colums correctly.
Column I Column II
(Name of organism) (Number of flagella)
1. Giardia a) one
2. Ceratium b) many
3. Trypnosoma c) two
4. Trichonympha d) eight
The correct answer is:
1) 1-c; 2-d; 3-b; 4-a 2) 1-d; 2-c; 3-b; 4-a
3) 1-d; 2-c; 3-a; 4-b 4) 1-a; 2-b; 3-c; 4-d

13. This type of prendopodium in the protozoans exhibits monopudial condition.
1) Lobopodium 2) Axopodium 3) Filopodium 4) Myxopudium

14. Abount conjugation in Vorticella, what are the correct statements?
i) only microconjugant acquires a girdle of aboral citia during the process of conjugation.
ii) Only genetic recombination occurs in both nuclei of vorticella after completion of conjugation.
iii) Exactly seven macro nuclei are formed in the zygote as a result of post – zygotic nuclear divisions.
The correct answer is:
1) i and iii 2) ii and iii 3) i and ii 4) only i

15. Read the following structuras of Euglena:
a) Nuclers b) Flagella
c) Chloroplasts d) Stigma
e) Paraflagellar body.
Which of above structurs are retained by one of the two daughter individuals of Euglena during binary fission?
Choose the correct answer:
1) c, d, and e 2) a, c, and e 3) a and b 4) ‘b’ only

KEY : 1-3; 2-1; 3-3; 4-4 5-4; 6-3; 7-2; 8-4; 9-1; 10-2; 11-4; 12-3; 13-1; 14-1; 15-4.

1. Match the following
Group Scales Tail
A) Teleostei Cycloid or Ctenoid Homocercal

B) Holostei both placoid and ganoid Diphycercal

C) Chondrichthyes Ganoid Heterocercal

D) Dipnoi Cycloid Diphycercal

E) Coelacanths Cosmoid Trilobe diphycercal
Choose the correct combinations
1) A,C,D 2) B,D,E 3) A,D,E 4) B,C,E

2. Following statements are related to the classification
I) Subspecies of a species are geographically isolated and are not capable of interbreeding.
II) Breeding between races of a species always result in sterile offspring
III) Differences among organisms increase from lower taxon to higher taxon.
Which of the above is/ are correct?
1) I 2) II 3) III 4) I, II, III

3. The body cavity of vertebrates isÆæéπ-
1) Enterocoel 2) Pseudocoel 3) Schizocoel 4) Acoel

4. Trilobed tail fin is the characteristic of-
1) Protopterus 2) Polypterus 3) Neoceratodus 4) Latimeria

5. Ancestors of reptiles are
1) Osteolepids
2) Labrynthodontians
3) Lissamphibians
4) Cotylosaurians

6. Read the following statements
I) Third International Congress of Zoology (ICZ) appointed a committee to frame International Rules of Zoological
Nomenclature (IRZN)
II) International Rules of Zoological Nomenclature were adopted in fourth ICZ.
III) International Code of Zoological Nomenclature appointed by
International Commission on Zoological Nomenclature.
1) I & II 2) II & III 3) I & III 4) I, II, III

7. Assertion (A): Urochordata and cephalochordata grouped under Acraniata.
Reason (R): They are the chordates without cranium.
1) Both ‘A’ and ‘R’ are correct. R is correct explanation for A.
2) Both ‘A’ and ‘R’ are correct but ‘R’ is not correct explanation for ‘A’.
3) A is true but R is false
4) Both ‘A’ and ‘R’ are false

8. Early jawed fishes are classified under.
1) Acanthodi 2) Placodermi 3) Rhipidisitia 4) Ostracodermi

9. The skull of amphibians is known as dicondylic because
I) It can be divisible into two equal halves
II) It has two occipital condyles
III) It has two orbits
Choose the correct statement
1) I 2) II 3) III 4) I and II

10. Which of the following statements are related to sibling species?
I) They are morphologically differ but can interbreed.
II) They are morphologically similar and can interbreed
III) They are morphologically similar and reproductively isolated
IV) They are the individuals of same species but geographically isolated
1) II 2) III 3) IV 4) I

11. Phosphogen of chordates is
1) Creatine Phosphate
2) Argenine Phosphate
3) Calcium Phosphate
4) Both Creatine Phosphate and Argenine Phosphate

12. Cartilagenous fishes were evolved from-
1) Osteichthyes 2) Placoderms 3) Acanthodians 4) Coelacanths

13. Oily substance secreted into the eyes of amphibians byÖ
1) Lacrimal glands
2) Sebaceous glands
3) Harderian glands
4) Meibomian glands

14. The continuous genetic adoptions of organisms to the environment is studied under-
1) genetics 2) Ecology 3) Evolution 4) Embryology

15. The type of cleavage in chordatesé
1) Radial and determinate
2) Spiral and determinate
3) Radial and indeterminate
4) Spiral and indeterminate

16. Unlike bony fishes sharks sink to the bottom when not swimming because
1) They have no anal fin
2) Their indoskeleton is heavier
3) They donot have operculum
4) They don’t have airbladder

17. Assertion (A): Necturus is described under the group perinnbranchiata
Reason (R): It has cylindrical tail
1) Both ‘A’ and ‘R’ are correct. R is correct explanation for A
2) Both ‘A’ and ‘R’ are correct but ‘R’ is not correct explanation for ‘A’
3) Both ‘A’ and ‘R’ are false
4) A is true but R is false

18. Match the following
LIST-I LIST-II
A) Richard Owen I) Natural History
B) George Cuvier II) Historia Generalis
C) Buffon III) Homeostasis
D) Bernard IV) Comparative V) Homology
Correct match is
1) A-V, B-IV, C-I, D-III
2) A-IV, B-I, C-III, D-II
3) A-II, B-IV, C-III, D-V
4) A-III, B-II, C-IV, D-V

19. Echinoderm ancestry of chordates was proposed by
1) Berril 2) Romer 3) Hyman 4) Garstang

20. The fish with spiracles, spiral valve and air bladder for respiration are included in-
1) Dipnoi 2) Crossopterygii 3) Chondrichthyes 4) Chondrostei

ANSWERS
1)3 2)3 3)3 4)4 5)2 6)3 7)1 8)1 9)2 10)2 11)1 12)2 13)3 14)3 15)3 16)4 17)4 18)1 19)4 20)4.

EAMCET Zoology Model Questions with Answers

EAMCET Zoology Practice Questions and Answers