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Sexual Reproduction in Flowering Plants 

Quiz-17

Dear Readers,

NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1. Anemophily is a type of pollination found in
  •  Salvia
  •  Bottle brush
  •  Vallisneria
  •  Coconut
Solution
Anemophily is a mode of cross-pollination, which is accomplished through the agency of wind. It occurs in coconut, date palm, maize, etc.

Q2.After fertilization, the outer integument forms
  •  Testa
  •  Tegmen
  •  Megagametes
  •  Pollen sacs
Solution
After fertilization, the outer integument forms tests.

Q3.   Microsporangia develops in to
  •   Pollens
  •   Microgametes
  •   Megagametes
  •   Pollen sacs
Solution
Microsporangia is like a sac in which pollen develops. Also called pollen sac at the time of maturity.

Q4. Double fertilization occurs among
  •  Algae
  •  Bryophytes
  •  Angiosperms
  •  Gymnosperms
Solution
Double fertilization is the fusion of one male gamete with female gamete (syngamy) and other male gamete with diploid secondary nucleus (triple fusion), i.e., double fertilization=syngamy + triple fusion. Double fertilization is characteristic feature of angiosperms. It does not take place in algae, bryophytes, pteridophytes and most gymnosperms.

Q5.Microspore develops into ova. This sentence is
  •  True
  •  False
  •  Sometimes (a) and sometimes (b)
  •  Neither (a) nor (b)
Solution
  Pollen grains. Microsporogenesis During developmental phase of anther the cells of sporogenous tissue undergoes meiotic division to form microspore tetrad. The process of formation of microspore from pollen mother cell is called microsporogenesis. The microspores are formed and arranged in a group of four cells called microspore tetrad. Microspore develops into the pollen grain and represents the male gametophyte Microspore mother cell and pollen mother cell are the same term and form male gametes (pollens) by the process called microsporogenesis

Q6. Polar nuclei are located in
  •   Embryo sac
  •  Thalamus
  • Pollen tube
  •  Ovule
Solution
Two polar nuclei are located in embryo sac, which participate in triple fusion.

Q7. The process of embryo formation without fertilization, is known as
  •  Apospory
  •  Apogamy
  •  Parthenocarpy
  •  Polyembryony
Solution
The embryo formation without fertilization is known as apogamy. Apogamy is the development of a sporophyte directly from the gametophyte without the intervention of sex organs and gametes.

Q8. A seed matures if water content is reduced to …’A’ ….. . If the general metabolism …B…. . The 
embryo enter a state called … C … . Choose correct option for A,B and C
  •  A-50-60%, B-fast, C-infertile
  •  TA-10-15%, B-slow down, C-dormancy
  •  A-35-50%, B-slow down, C-development
  •  A-35-60%, B-fast, C-Embryogenesis
Solution
A-10-15%, B-Slowdown, C-Dormancy

Q9. Viability of pollen grains depends on
  •   Temperature
  •   Humidity
  •   Both (a) and (b)
  •  Pressure
Solution
The period in which the pollen grains remain viable is highly variable. It depends on the temperature and humidity. In some cereals such as rice and wheat, the pollen grains loose viability with in 30 minutes of their release and in some members of Rosaceae, Leguminosae and Solanaceae, they maintain variability for months

Q10. Tapetum is
  •   Protective
  •   Reproductive
  •   Nutritive
  • Respiratory
Solution
Tapetum is the innermost layer of the wall of pollen sac. The tapetum is nutritive in function. The tapetal cells are multinucleate and contain Ubish bodies

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