Reproduction in flowering plants Quiz-03

Reproduction in flowering plants Quiz-03

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.   Synergid’s filiform apparatus

•  Guide the pollen tube
•  Guide the style for development
•  Present near the micropylar end
•  Both (a) and (c)

Solution
(d) Both (a) and (c) Filiform apparatus are the special thickening of synergid cells for guiding the pollen tube and male gametes, so that the fusion takes place property

Q2.   In chasmogamy pollination takes place in

•  Open flower
•  Closed flower
•  Large flower
•  Geitonogamy flower

Solution
(a) Chasmogamy is the type of autofertilisation (self-fertilisation) in which both male and female gametes present on same flower but pistil and stamen have special adaptation like bending length, etc., so that fertilization takes place. They are open flower not closed like cleistogamous flowers

Q3.   ‘Cells in the micropylar region are called antipodal cell’

•  True
•  False
•  Sometimes (a) and sometimes (b)
•  Neither (a) nor (b)

Solution

Q4.   The nutritive layer of microsporangia of cypsella

•  Endothecium
•  Exothecium
•  Sporogenous tissue
•  Tapetum

Solution
(d) The innermost layer of microsporangium (central mass of sporogenous tissue) is tapetum, which is nutritive in function, whereas outer most layer endothecium is protective and sporogenous tissue after meiosis give rise to microspore mother cell.

Q5.   Aquatic plant like water-hyacinth and water lily are pollinated by

•  Water
•  Air
•  Insect
•  Both (b) and (c)

Solution
(c) Water hyacinth is aquatic plant but it is not pollinated by water. It is pollinated by insect

Q6.   Consider the following statements and choose the correct option. I. The genetic constitution of a plant is unaffected in vegetative propagation. II. Rhizome in ginger serves as an organ of vegetative reproduction. III. Totipotency of cells enables us to micropropagate plants.

•  Statements I and II alone are true
•   Statements II and III alone are true
•  Statements II alone is true
•  All the three Statements I, II and II are true

Solution
(d) In vegetative propagation, there is no genetic recombination, so the genetic constitution of a plant is unaffected in vegetative propagation. In ginger (Zingiber officinale), the means of vegetative propagation is fleshy, dorsiventral, horizontal, branched, underground, perennial, straggling rhizome (modified stem). Totipotency is the capability of any plant cell to develop into entirely new plant when provided with the suitable growing medium. it enables us to micropropagate plants.

Q7.   Pollination by insect is

•  Entomophily
•  Chiropterophily
•  Anemophily
•  Zoophily

Solution
(a) Pollination is a process of transfer of pollen grains from an anther to the stigma of the same flower or of different flower. Pollination may be self pollination (or autogamy), i.e, (transfer of pollen grains from anther to the stigma of same flower) or cross pollination (or allogamy), i.e., transfer of pollen grains to the stigma of different flower. Some agencies used in cross pollination are: 1.Insects (Entomophily) 2.Wind (Anemophily) 3.Water (Hydrophily) 4.Birds (Ornithophily) 5.Bats (Cheitropterophily).

Q8.   For a gene if AA = male plant, BB = female plant. Find out the genotype of endosperm and embryo

•  AAB, BBA
•  AAB, AB
•   ABB, AB
•   BBA, AAB

Solution
(c) Endosperm Genotype Endosperm is formed by fusion of male gamet and polar nuclei so, the genotype of endosperm is ABB Embryo Genotype Embryo is formed by fusion gametes (1n) of male and female. So, the embryo genotype is AB

Q9.   Majority of plants are

•  Biotic agent for pollination
•  Non- biotic agent for pollination
•  Air for pollination
•  Animals for pollination

Solution
(a) Majority of plants use biotic agents for pollination because that reduce the chances of wasting pollens

Q10.   Tapetal cells are characterized by

•   Mitotic division
•  Meiotic division
•  Endomitosis
•  Endomitosis as well as endopolyploidy

Solution
(d) Tapetum is the innermost layer of anther wall. It is the major nourishing layer. Its cells become multinucleate and polyploid through endomitosis and endopolyploidy.