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Sexual Reproduction in Flowering Plants 

Quiz-18

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. Identify A to H in the given diagram
       

  •  A-Chalazal end, B-Embryo sac, C-Nucellus, D-Inner integuments, E-Outer integuments, 
  •      F-  Micropylar pole, G-Micropyle, H-Funicle, I-Hilum
  •  A- Inner integuments, B- Nucellus, C-Embryo sac, D- Chalazal end, E- Hilum, F- Funicle, 
  •      G- Micropyle, H- Micropylor end, I- Outer integuments
  •  A- Hilum, B- Funicle, C- Micropyle, D- Micropylar pole, E- Outer integuments, 
  •      F- Inner integuments, G- Nucellus, H- Embryo sac, I- Chalazal pole
  •  A- Micropylar end, B- Micropyle, C- Funicle, D- Hilum, E- Outer integuments, 
  •      F- Inner integuments, G- Nucellus, H- Embryo sac, I- Chalazal end
Solution
Megasporangium The ovule is a small structure attached to the placenta by means of stalk called funicle. The body of the ovule fuses with funicle in the region called hilum. Thus, hilum represents the junction between ovule and funicle. Each ovule has one or two protective envelope called integuments. These integuments encircle the ovule except the tip, where a small opening called micropyle is organised. Opposed to the micropylar end is the chalaza representing basal part of the ovule.
   

     


Q2.Find out the correct statement
  •  Parthenocarpic fruits are seedless
  •  Parthenocarpy is developed by hormones
  •  Both (a) and (b)
  •  Parthenocarpic seeds are developed by fertilized ovary
Solution
In most of the species fruits are results of fertilization. There are few species in which fruits develop without fertilization. Such fruit are called parthenocarpic fruits. Banana is one such example. Parthenocarpy can be induced through application of growth hormones and such fruit are seed less

Q3.   ‘Sporopollenin is absent at the germpore’. The above statement is
  •   True
  •   False
  •   Sometimes (a) and sometimes (b)
  •   Neither (a) nor (b)
Solution
True. So that at the time of germination the pollen tube can emerge out from germ pore

Q4. Pollination is
  •  Shedding of pollens
  •  Maturing of anther
  •  Transfer of pollen to stigma
  •  Formation of pollen
Solution
Pollination Transfer of pollen grains to the stigma is called pollination.
     



Q5.Xenia refers to
  •   Effect of pollen on endosperm
  •   Effect of embryo on sperm
  •   Both (a) and (b)
  •   None of the above
Solution
  Xenia refers to the effect of pollen on endosperm.

Q6. Orthotropous ovule belongs to
  •  Urtica
  •  Polygonum
  • Peperomea
  •  All of these
Solution
In orthotropous ovule (also called atropous or erect ovule), chalaza, micropyle and funicle lie in straight line, e.g., Urtica, Polygonum and Peperomea. This is a primitive type of ovule.

Q7. Vegetative fertilization leading to the formation of endosperm refers to
  •   Fusion of male gamete with diploid secondary nucleus
  •   Fusion of female gamete with diploid secondary nucleus
  •   Fusion of two diploid vegetative cells
  •   Fusion of two male gametes
Solution
The chromosome number in gamete (n) of Ophioglossum (a tern) is 630, of rice is 12, of potato is 24, and of man is 23.

Q8. Single megasporic development is called
  •   Single sporic
  •   Unisporic
  •   Monosporic
  •   Nulleiporic
Solution
Although the meaning of unisporic monosporic, single sporic cell is same but only monosporic term is used for single megaspore.

Q9. Name the parts A, B, C, D and E in the given diagram.

  •  A – Germ pore B – Generative cell C – Intine D – Exine E - Vegetation cell
  •  A – Germ pore B – Generative cell C – Exine D – Intine E - Vegetation cell
  •  A – Intine B –Exine C – Germ pore D – Generative cell E - Vegetation cell
  •  A – exine B –Intine C – vegetation cell D –Germ pore E-Generative cell
Solution
A –Exine B – Intine C – Vegetative cell D- Germ pore E – Generative cell

Q10. The process of formation of microspore from the microspore mother cell is called megasporogenesis. The above statement is
  •   True
  •   False
  •   Sometimes (a) and sometimes (b)
  •   Neither (a) nor (b)
Solution
Microsporogenesis Microspore mother cell and pollen mother cell are the same term and form male gametes (pollens) by the process called microsporogenesis

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