What is Libido ?

 l). The period from birth to the natural death of an organism is called as
          (A) regeneration (B) life span (C) metamorphosis (D) reproduction 

2). Complete the given analogy w.r.t. life span of organism. 
        crocodile : 60 years :: Parrot : 
        A) l2 years (B) IS years (C) 10 years (D) I40 years 

3). The ability of living organism to give rise to the young ones of its own kind is called 
          (A) segregation (B) reproduction (C) perpetuation (D) sedimentation 

4). Assertion: Reproduction enables continuity of species, generation after generation. 
     Reason: Reproduction is a biological process in which an organism gives rise to young ones                 (offsprings) like itself.

     (A) Both assertion and reason are true and reason is the correct explanation of assertion. 

      (B) Both assertion and reason are true but reason is not the correct explanation of assertion. 

       (C ) Assertion is true but reason is false. 

       (D) Both assertion and reason are false. 

5) _______is a life process that is not essential for an individual’s survival but for survival of the              species.
 (A) Growth (B) Reproduction (C) Respiration (D) Nutrition 

6) Read the following statements about ‘Terror ofBengal’ and select the correct ones. 
    (i) ‘Terror of Bengal‘ is the name given to water hyacinth (Eichhornia). an algae.
     (ii) Eichhornia  was introduced in India due to its aesthetic value. 
    (iii) Eichhornia drains oxygen from the water which leads to death of fishes. 

       (A) (i) and (ii)
       (B) (i) and (iii) 
       (C) (ii) and (iii) 
       (D) (i). (ii) and (iii)

7)Production of offsprings by a single parent without fusion of gametes is called 

(A) asexual reproduction 

(B) sexual reproduction 

(C ) amphimixis 

(D) all of the above 

8) Which of the following statements regarding asexual reproduction are correct? 

(i) It is umparemal. 

(ii) The offsprings produced are genetically identical to the parenL 

(iii) production and fusion of gametes is necessary. 

(iv) The oll‘springs produced show genetical variation. 

(A) (i) and (ii) are correct 

(B) (iii) and (iv) are correct 

(C) (ii)and(i|i)are correct 

(D) (i) and (iv) are correct 

9) Asexual reproduction involves
    (A) only meiosis 
    (B) only mitosis 
    (C ) both mitosis and meiosis 
     (D) either mitosis or meiosis 

10) Assertion: C lones are produced as a result of a sexual reproduction. 
      Reason: C lones are morphologically and genetically similar individuals. 

(A) Both assertion and reason are true and reason is the correct explanation of assertion. 

(B) Both assertion and reason are true but reason IS not the correct explanation of assertion. 

(C) Assertion is true but reason is false. 

(D) Both assertion and reason are false. 

   Select the correct statement from the following regarding asexual reproduction. 

(i) It is slower than sexual reproduction 

(ii) It involves a single parent 

(iii) It produces progeny that are genetically identical with the parent 

(iv) Clones are the progeny of asexual reproduction ll-lAM (‘ET 20l6| 

(A) i, ii. iii, iv       (B) i, ii, iv 

(C) i, ii. iii            (D) ii. iii. iv 

11)     Asexual reproduction takes place in 

(A) monera 

(B) protists 

(C ) sponges 

(D) all of thcse

Methods of asexual reproduction in lower organisms include 

(A) binary fission, budding 

(B) fertilization, syngamy 

(C) porogamy, autogamy 

(D) geitonogamy, xenogamy 

12) A type of asexual reproduction in a unicellular organism in which parent cell divides to produce two equal cells which develop into two new individuals is called 

(A) budding (B) binary flssion (C) sporulation (D) fragmentation 

13) As a result of binary flssion, number of individuals produced by one fission is 

(A) two (B) three 

(C) four (D) five