CSS Zoology 2013



Q.1. Select the best option/answer and fill in the appropriate Circle on the OMR Answer Sheet. (20x1=20)

  1. Metamerically segmented worms belong to phylum:

(a) Nematoda

(b) Platyhelminthes

(c) Annelida

(d) None of these

  1. Which of the following is a multiflagellate Protozoa?

(a) Ceratium

(b) Noctiluca

(c) Leishmania

(d) None of these

  1. Spicules are secreted by:

(a) Scleroblasts

(b) Nematoblasts

(c) Endoblasts

(d) None of these

  1. Which of the following is a porous opening through which water enters the hydrocoel of an echinoderm?

(a) Pedicellaria

(b) Tube feet

(c) Madreporite

(d) None of these

  1. The body cavity of most triploblastic animals formed by splitting the mesoderm into an outer and an inner layer is called:

(a) Coelentron

(b) Coelom

(c) Colon

(d) None of these

  1. Compound eyes are found in:

(a) Platyhelminthes

(b) Ecinodermate

(c) Mollusca

(d) None of these

  1. Egg-laying mammals are placed in sub class:

(a) Meththeria

(b) Prototheria

(c) Theria

(d) None of these

  1. Open circulatory system is found in:

(a) Birds

(b) Earthworms

(c) Cockroaches

(d) None of these

  1. Bivalve molluscs are usually:

(a) Scavangers

(b) Deposit feeder

(c) Filter feeder

(d) None of these

  1. The pillar or central axis around which the whorls of a gastropod shell are coiled is called:

(a) Columella

(b) Collembola

(c) Colloblasts

(d) None of these

  1. The ninth vertebra of frog is known as:

(a) Cervical

(b) Sacral

(c) Urostyle

(d) None of these

  1. The stage in an embryo in which the primary germ layers have been laid down is called:

(a) Gastrula

(b) Blastula

(c) Morula

(d) None of these

  1. A fish which migrates down river to spawn in the sea is called:

(a) Anadromous

(b) Catadromous

(c) Dromiacea

(d) None of these

  1. Which of the following has four-chambered heart?

(a) Dog fish

(b) Frog

(c) Pigeon

(d) All of these

  1. Facets by which vertebrae articulate with one another are called:

(a) Metapophyses

(b) Parapophyses

(c) Zygopophyses

(d) None of these

  1. The inner membrane of the two foetal membranes in reptiles, birds and mammals is called:

(a) Amnion

(b) Chorion

(c) Peritoneum

(d) None of these

  1. Amphioxus is an example of:

(a) Urochordata

(b) Cyclostomata

(c) Hemichordata

(d) None of these

  1. Filarial worm (genus Wuchereria) belong to phylum:

(a) Nematoda

(b) Platyhelminthes

(c) Annelida

(d) None of these

  1. Notochord is formed from primary:

(a) Ectoderm

(b) Mesoderm

(c) Endoderm

(d) All of these

  1. Shell fish includes:

(a) Shrimp, Crabs and eel fish

(b) Dog fish, crabs and lobsters

(c) Lobsters, crabs and shrimps

(d) All of these



Q.2. (a) Give an account of life cycle of Fasciola hepatica. (10)

(b) Describe the various types of larval forms found in crustacea. (10)

Q.3. (a) What is the difference between corallite and coral reef? Give a detailed account  of the various forms of coral reefs. (10)

(b) Write an essay on parasitic adaptation in platyhelminthes. (10)

Q.4. (a) Describe the morphology and microscopic structure of the shell of a gastropod mollusc such as Pila. (10)

(b) Describe the water vascular system of star fish. (10)

Q.5. Write short notes on the following:- (5 each)

(a) Binary fission in Paramecium

(b) Flame cells

(c) Leishmaniasis

(d) Spicules


Q.6. (a) Describe various types of heart found in the vertebrate. (10)

(b) Give an account of flight adaptation of birds. (10)

Q.7. (a) Describe the pelvic girdle of frog with the help of labelled diagram. (10)

(b) Give a detailed structure of the eye of frog. (10)

Q.8. Write short notes on the following:- (5 each)

(a) Biting mechanism of snakes

(b) Placenta

(c) Fish scales

(d) Neuron