Tuesday, December 17, 2013

UGC-CSIR LIFE SCIENCE PRACTICE MCQ-ORIGIN OF LIFE



1.              It is suggested that protoplasm originated in sea water because……….
a)       Salt concentration in many land form is less than 1%
b)       Salt concentration in sea water is much higher
c)       Most of the salt in the protoplasm show a remarkable similarity to sea water
d)       None of the above
2.              The first organism to appear on the earth was more like plants than like animals because:
                a) plants are simple in structure                             b) plants can manufacture their own food
                c) there are more plants than animals                    d) plants are green colored
                e) none of the above
3.              Darwin’s theory of natural selection to explain organic evolution was based on:
a)       modifications in organs through use and disuse
b)       prodigality of reproduction, struggle for existence and survival of the fittest
c)       inheritance of acquired character
d)       appearance of sudden large variations, their inheritance and survival of those having these variations
e)       none of these
4.              For evolutionary success, a mutation must occur in:
                a) germplasm DNA                              b) germplasm RNA                              c) somatic RNA
                d) somatic DNA                                   e) plasma protein
5.              Role of isolation in evolution is
a) differentiation of species                                      b) maintenance by species                                                     
c) evolutionary divergence                d) extermination of species               e) all of them
6.              The set of homologous organs amongst the following is:
                a) hand of man and wings of bat.                       b) eyes of man and eyes of squid
                c) gills of fish and lungs of man                         d) leaf of moss and root of fem                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
7.              Which of the following is a criticism of Larmark’s theory?
a)       retractile claws of carnivores for speedy running
b)       snakes lost limbs and narrow long body for cavedwelling
c)       giraffe developed long necks as an adaptation for feeding
d)       drosophila in dark for 62 generation developed ordinary eyesight.
8.              Which is a haemoflagellata
                a) plasmodium                     b) trypanosoma                    c) Entamoeba                       d) all of the above
9.              Nemathelminthes are:
a)       triploblastic, acoelomates and bilaterally symmetrical
b)       diploblastic, pseudocoelomates and bilaterally symmetrical
c)       triploblastic, eucoelomates and bilaterally symmetrical
d)       triploblastic, psedoelomates and bilaterally symmetrical
e)       triploblastic, pseudocoelomates and radically symmetrical
10.           Match the following and select the wrong matching
                a) ragworm – nereis                              b) pinworm – oxyuris                        c) round worm      -- ascaris                d) seat worm – enterobius                             e) sand worm – earth worm
11.           If amoeba is kept in distilled water, its contractile vacuole:
                a) works slowly                                    b) works faster                                      c) remain unaffected
                d) disappears                                        e) will get larger
12.           The most successful parasite is one that has
                a) a life cycle involving sequence of hosts                      b) permanently attached to the host
                c) undergone great amount of degeneration                   d) makes the minimum demand on the host
               e) no life cycle
13.           Measly port will contain
                a) a large number of microfilariae                                        b) encysted cysticerious larvae
                c) hexacanth larva of tape worm                       d) miracidium larvae           e) flesh infected with taenia
14.           Snake venom is
                a) alkaline in reaction                          b) acidic in reaction.                c) alkaline and rich in fatty acid                 d) acidic and rich in fatty acid                               e) neutral
15.           Which is the following is the intestinal round worm?
                a) Ascaris lumbricoids                                                     b) Ancylostoma duodenale
                c) Enterobius vermicularis                                              d) Wucheraria bancrofti
e) Dracunculus medinensis
16.           Nereis is hermaphrodite but shows cross-fertilization. This is because:
                a) protandrous condition                  b) protogyny                                 c) there is no larval stage
                d) self-fertilization produce unviable eggs                                       e) none of these
17.           Which of the following is not true about classification of chordata?
a)       phylum chordata is divided into four sub-phyla-hemichordata
b)       gnathostomata have true jaws and are divided into two super classes; pisces and tetra poda
c)       subphylum vertebrata has two divisions – agnatha and gnathostamata
d)       super class tetrapoda has four classes – amphibia, reptilia, aves and mammals
18.           Which of the following is not a lung fish?
                a) latimaria            b) neoceratodus                   c) lepidosiren       d) protopterus       e) all of these
19.           Flightless birds are kept in a particular group of birds called
                a) ratitae                b) impennae                c) carinatae               d) odontognathae                     e) neognathae
20.           Which of the following is present in rat but absent in frog:
                a) salivary gland         b) skin gland          c) adrenal gland      d) thyroid gland     e) none of these
21.           The structure present in earthworm similar to intestinal vill of man is
                a) prostrate gland                 b) typhlosole                        c) chloragogen cells            d) clitellum                           e) none of these
22.           Number of occiptal condyle in mammals is
                a) 1         b) 2         c) some time 1, some time 2              d) uncertain          e) none of these
23.           Respiration in tadpole of frog takes place by
                a) pulmonary respiration                    b) Buccal respiration                          c) Branchial respiration     
              d) Cutaneous respiration                    e) Bucco pharyngeal respiration
24.           Typhlosole is
a)       the respiratory structure of certain aquatic annelids
b)       last segment of nereis
c)       the dorsal fold of alimentary canal of earth worm
d)       the straight region of intestine
e)       fold of skin between segments
25.           Ventral nerve cord in Cockroach has
a)       9 ganglia in abdominal region
b)       3 ganglia in thoracic part and 6 abdominal part
c)       6 ganglia in thoracic part and 3 abdominal part
d)       9 ganglia in thoracic part and 3 abdominal part
e)       Numerous ganglia
26.           A non-matching set in the following is:
                a) Rhacophorus – Flying frog                            b) Ichthyophis – Blind worm
                c) Phrynosoma – Desert lizard                          d) Hippocampus – Dog fish
                e) Echidna             - Spiny ant eater
27.           Venous heart with single circulation is seen in
                a) neoceratodus        b) salamander            c) scoliodon                d) snake                            e) none
28.           Which of the following is absent in frog:
                a) pancreas            b) large intestine         c) salivary glands          d) middle ear           e) cerebellum
29.           Male cockroaches are distinguished from the females by the presence of
                a) anal cercus        b) anal style          c) fore wing           d) coxa                   e) compound eye
30.           Bidder’s canal is present in
                a) rabbit         b) frog         c) rat          d) man                  e) both b & c                   e) cockroach

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