Semester III Embryology Objective Questions

 1) The number of cells present in a typical angiosperm embryo sac ( )

       A) 5       B) 4      C) 6       D) 8

2) Tapetum is a                          ( )
A) Nourishing Layer B) Protective Layer C) Vestigeal Layer  D) None

3) The secondary nucleus after fusing with one of the two male gametes develops into ( )
A) Seed  B) Fruit C) Embryo D) Endosperm

4) Ovule is inverted and micropyle is very close to hilum in  ( )
A) Anatropous B) Orthotropous C) Amphitropous D) None

5) Ovular structure associated with directing the growth of pollen tube towards the micropyle is called                                                                                                                               (        )
A) Obturator    B) Pollenkit C) Translator D) None

6) The embryo in a seed gives rise to a new ( )
A) Sporophyte B) Gametophyte C) Microgametophyte D) Megagametophyte

7) Ruminate type of endosperm is present in ( )
A) Annona B) Hibiscus C) Magnolia D) Grevellia

8) Which type of pollination occurs in Commelina flowers ( )
            A) Geitonogamy B) Xenogamy C) Homogamy D) Cleistogamy

9) Two nuclei at the mycropylar and chalazal end is observed in ( )
            A) Pennia type B) Plumbago type C) Peperomia type D) Adoxa type

10)  In which of the following types of stomata, the guard cells are not surrounded by distinct subsidiary cells? ( )
                 A)  Anisocytic  B) Paracytic C) Cyclocytic D) Anomocytic

11) Formation of embryo directly from nucellus and integument is ( )
A) Adventive Polyembryony B) Apospory C) Apogamy D) Apomixis

12) Maturation of male and female sex organs at different times is known as ( )
A) Herkogamy B) Dichogamy C) Polygamy D) Apogamy

13) Egg apparatus consists of ( )
A) Egg and Antipodals B) Polar Nuclei C) Egg and Synergids D) Egg

14) Cleistogamous condition is present  in                                                 (        )                                              A)Brassica B) Solanum tuberosum C) Commelina D) Allium cepa
 
15) Synergids are ( )
A) Haploid  B) Diploid C) Diploid after fertilisation D) Triploid after fertilisation

16) Germ pore is the region where the exine is ( )
A) Thin B) Uniform C) Thick and uniform D) Absent

17) Which of the following genera has two polar nuclei in its mature embryo sac? 
           A. Orchis       B. Oenothera       C. Plumbago      D. Nymphaea 

18). Members of which of the following families usually lacks endosperm? 
          A. Brassicaceae        B. Onagraceae          C. Piperaceae       D. Orchidaceae  

19). Apomixis is the type of reproduction which results in 
      A. Development of plants without fusion of gametes    
      B. Development of plants from fusion of gametes 
      C. Development of embryo from tapetal cells      D. Development of embryo from endospenn 

20). Geitonogamy is a type of pollination where 
       A. Transfer of pollen grains from the anther to the stigma takes place between different flowers in                 the same plant or genetically similar plants 
      B. Transfer ofpollen grains from the anther to the stigma takes place between diflerent flowers of                  genetically different plants 
      C. Transfer of pollen grains from the anther to the stigma takes place within the same flower 
      D. Transfer of pollen grains from the anther of one plant species to the stigma of the flower of a non-related plant species

21)  Corn has a diploid number of 20. How many chromosomes would be expected in 
    a) a meiotic product b) a polar nucleus, c) a mature embryo sac d) an endosperm cell 

     A. 10, 10,30,30      B. 10,20, 10,30      C. 10, 10, 10, 10        D.20,30, 10,30

 22) After pollination, which of  he following events is vital for fertilization to ocour in flowering plants? ' 
     A. Sperms swim to the egg and the polar nuclei 
     B. Petals close around the reproductive parts 
     C. Meiosis occurs within the pollen grain
     D. A pollen tube grows from the stigma to the ovule 

23. When a diploid embryo sac is formed from a megaspore mother cell without a regular meiotic division, then the process is called
       A. Parthenogamy     B. Polyspermy     C. Polygamy     D. Diplospory

24. The phenomenon leading to the development of embryo from synergids or antipodal cells without fertilization is known as:
         A. Apospory         B. Apogamy       C. Autogamy      D. Diplospory

 25. Match the types of  ovule (group A) with the conesponding plant (group B) 

            Group A                                Group B
        a. Orthotropous                          i. Lemna
        b. Anatropous                            ii. Opuntia
        c. Amphitropous                        iii. Polygonum 
        d. Circinotropous                      iv. Ricinus

       A.   a - ii     b-iv     c- i     d- iii          B. a- iv    b- ii     c- iii   d- i
       C.   a - iii    b- iv    c- i     d- ii           D. a - iv   b- iii    c- i     d- ii

26. What is "Aleurone layer" and what is its nature? 
      A. It is the outermost layer of endosperm and made up of protein 
      B. It is the outermost layer of endosperm and made up of carbohydrate
      C. It is the outermost layer of stomata and made up of protein 
      D. It is the outermost layer of stomata and made up of glycoprotein

27. Endosperm formation begins with 
       A. The establishment of the suspensor                        B. The fusion of the antipodals 
       C. The synctial development of the embryo             D. The fertilization of the polar nuclei

28. The mature female gametophYte of an angiosperm is 
    A. the archegonium and its egg cell 
    B. the owle inside the ovary 
    C. the carpel after pollinationbo
    D. an embryo sac with eight nuclei and seven cells

29.  In monocot plants, the outer covering of endosperm separates the embryo by a proteinaceous layer is called 
       A) Aleurone layer      B) Coleorhiza      C) Coleoptile    D) Apocarpus layer

30. What do you understand by term "Scutellum"? 
     A) It is type of human scrotal filariasis disease which is caused by Wuchereria bancrofti
     B) It is a part of newly identified human organ mesentery which helps in protection of intestine 
     C) This a part of mono cot seeds in plant 
     D) This a part of plant flower which help in sexual reproduction

31. Two nuclei at micropylar and chalazal end are observed in
        A. Penia type    B. Plumbago type    C. Peperomia type    D. Adoxa type.

32. Amoeboid Tapetum is present in 
        A. Tradescantia    B. Typha    C. Tridax    D. Helianthus

33. Pantoporate pollen are recorded in                                                    (         )

       A)Tribulus terrestris                  B) Ocimum sanctum        

       C) Delonix regia                D) Catharanthus roseus

34. Insect pollinated flowers usually possess                                                 (         )

        A. dry pollen with smooth surface        B. sticky pollen with rough surface

        C. large quantities of pollen                  D. brightly colored pollen

35.  Functional megaspore in an angiosperm develops into

A.      Endosperm     B. Embryo      C. Embryo-sac      D. Ovule

36. Which of the following pair have haploid structures?                                 (         )

      A.  nucellus and antipodal cells   B.  antipodal cells and egg cell

      C. antipodal cells and megaspore mother cell    D. nucellus and primary endosperm nucleus

37.  Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other?           (         )

       A.  amphitropous      B. circinotropous     C. atropous    D. antropous.

38. The arrangement of the nuclei in a normal embryo sac in the dicot plants is

       A.  3 + 3 + 2       B.  2 + 4 + 2      C. 3+2 + 3    D. 2 + 3 + 3


39. The embryo in a seed gives rise to a new _________.

 

40. When the body of the ovule, embryo sac and micropyle lie at a right angles to the funiculus the ovule is called _____________

 

41. The number of cells present in a typical angiosperm embryo sac ___________________

 

42. The ploidy of matured endosperm cells is ___________________

 

43. Tapetum is a  ­­­­­­­­­­­­­­­­­­­_________________ layer

 

44.  In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains   ______________________

 

45. Morphological nature of edible part of coconut is   ­­­­­­­­­­­­­­­­______________________

 

46. Filliform apparatus is present in  ________

 

47. Apomitic embryos in citrus arise from _________________

 

48. Egg apparatus consists of  ___________ and ___________


49. Double fertilisation in angiosperms was discovered by _______________


50. Phenomenon of the formation of more than one embryo per ovule is called ___________


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