CBSE Questions for Class 12 Medical Biology Sexual Reproduction In Flowering Plants Quiz 11 - MCQExams.com

The objective of bud pollination, in which mature pollen is applied to immature non-receptive stigma generally 1 to 3 days prior to anthesis, is to ___________________.
  • Hasten the maturity of pollinated stigma
  • Increase the viability period of pollen applied
  • Promote cross-pollination between related species
  • Overcome self-incompatibility
Which of the following statements is not correct?
  • In corn, the mature seed is exalbuminous
  • In orchids, the embryo has no cotyledons
  • In corn, the embryo contains young leaves while in the seed
  • In peach, the fruit is drupe
Polyembryony is a predominant feature in the species of ____________.
  • $$Mangifera$$
  • $$Opunitia$$
  • $$Eugenia$$
  • $$Citrus$$
Select the options that contains all plants which produce non-endosprmic seeds.
  • Gram, pea, bean, groundnut
  • Castor, peanut, orchid, wheat
  • Coconut, walnut, wheat, gram
  • Castor, maize, coconut, orchid
Anemophily type of pollination is found in
  • Salvia
  • Bottle brush
  • Vallisneria
  • Coconut
Which one of the following is typical of a monocot embryo? Plumule Radical Cotyledon?
  • Terminal Axial Lateral
  • Lateral Axial Terminal
  • Lateral Terminal Axial
  • Axial Lateral Terminal
Yucca is pollinated by a.
  • Fruit fly
  • Butterfly
  • Honeybee
  • Moth
Match List-I(Plant) with List-II(type of pollination according to the agency of pollination) and select the correct answer using the codes given the lists.
List-IList-II
a. Maize(Zea)$$1$$. Hydrophilous
b. Snapdragon(Antirrhinum)$$2$$. Chiropterophilous
c. Silk cotton(Salmalia)$$3$$. Entomophilous
d. Vallisneria$$4$$. Anemophilous
$$5$$. Ornithophilous
  • A-$$4$$, B-$$5$$, C-$$2$$, D-$$1$$
  • A-$$4$$, B-$$3$$, C-$$5$$, D-$$1$$
  • A-$$2$$, B-$$3$$, C-$$5$$, D-$$4$$
  • A-$$3$$, B-$$1$$, C-$$2$$, D-$$4$$
The number of synergids and antipodals present in a typical angiosperm embryosac at maturity respectively are 
  • Two and three
  • One and three
  • Three and two
  • One and two
The phenomenon of replacement of sexual reproduction with asexual reproduction is called
  • Vivipary
  • Apomixis
  • Karyogamy
  • Syngamy
Which one of the following pairs is correctly matched?
  • Monophonic-$$4$$-nucleate-Adoxa embryo sac
  • Bisporic-$$8$$-nucleate-Oenothera embryo sac
  • Tetrasporic-$$8$$-nucleate-Fritillaries embryo sac
  • Tetrasporic-$$16$$-nucleate-Plumb ago embryo sac
Which one of the following statements is correct?
  • Hard outer layer of pollen is called intine.
  • Sporogenous tissue is haploid.
  • Endothelium produces the microspores.
  • Tapetum nourishes the developing pollen.
Dicotyledonea is a _______
  • Class
  • Taxon
  • Both a and b
  • Kingdom
The  stage when all the body parts can be identified is known as _____________.
  • Zygote
  • Foetus
  • Embryo
  • Infant
Polyembryony was discovered by
  • Leeuwenhoek
  • Maheshwari
  • Winkler
  • Cooper
What would be the genetic nature of apomictic embryos?
  • Genetically dis-similar
  • Genetically similar
  • Sometimes genetically similar and sometimes genetically dis-similar
  • Always haploid
Member of plantae having endospermic, perispermic, polycotyledonous and winged seeds is also related to
  • Sulphur shower
  • Largest ovule
  • Double fertilization
  • Placentation
The ploidy of the stamen is equal to the
  • Ploidy of all the four pollen grains
  • Ploidy of one pollen grain
  • Ploidy of 8 male gametes
  • Ploidy of two microspores
Choose the correct answers from the alternatives given.
Which of the following is mismatched?
  • Polle grain-microgametophyte
  • Ovule-megagametophyte
  • Seed-immature sporophyte
  • Pollen tube-spores
Choose the correct answers from the alternatives given.
The process of pollen transfer from anther to stigma of a flower is known as ________.
  • anthesis
  • pollination
  • fertilization
  • parthenogenesis
Zygote of Capsella bursapastoris divides through
  • Longitudinal division
  • Equal transverse division
  • Unequal transverse division
  • Oblique division
Self fertilisation is seen in
  • Unisexual flower of papaya
  • Bisexual flower of pea
  • Unisexual flower of date palm
  • Bisexual flower of coconut
Endosperm is absent in
  • Podostemonaceae
  • Orchidaceae
  • Trapaceae
  • All the above
The innermost layer of the anther wall is tapetum which
  • helps in dehiscence
  • provides mechanical support
  • provides protection
  • provides nutrition
The anther and filament are parts of the
  • Pistil
  • Receptacle
  • Petal
  • Stamen
Name the plant shows adventive embryonic cells.
  • Sunflower and Mango
  • Citrus and Mango
  • Lemon and Maize
  • Lemon and Palms
Choose the correct answers from the alternatives given.
A pollen grain is best defined as a
  • male gamete
  • microspore mother cell
  • partially developed male gametophyte
  • partially developed embryo
Insects visit flowers to help in pollination.
  • True
  • False
The process of removal of ovules from male parent before the anthers burst is called emasculation.
  • True
  • False
A pollen tube of a flowering plant is the
  • Male gamete
  • Female gamete
  • Germinating spore
  • Male gametophyte
The emasculation is required for
  • pure lines
  • cross pollination
  • natural hybridization
  • selective hybridization
Find out the incorrect match.
  • Sterile stamen - Staminod
  • Stamens attached to petals - Epipetalous
  • Stamens attached to perianth - Episepalous
  • Free stamens - Polyandrous
Winged pollen grains are present in
  • Mango
  • Mustard
  • Pinus
  • Cycas
Endosperm, a product of double fertilisation in angiosperms is absent in the seeds of-
  • Coconut
  • Orchids
  • Maize
  • Castor
Pollen grains can be stored for several years in liquid nitrogen having a temperature of
  • $$-196^oC$$
  • $$-120^oC$$
  • $$-160^oC$$
  • $$-80^oC$$
In flowering plants, both male and female gametes are non-motile. The method to bring them together for fertilisation is _________.
  • Water
  • Air
  • Pollination
  • Apomixis
Which of the following situations correctly describes the similarity between an angiosperm egg and a human egg?
(i) Eggs of both are formed only once in a lifetime.
(ii) Both the angiosperm egg and human egg are stationary.
(iii) Both the angiosperm egg and human egg are motile transported.
(iv) Syngamy in both results in the formation of zygote.

Choose the correct answer from the options given below.
  • (ii) and (iv)
  • (iv) only
  • (iii) and (iv)
  • (i) and (iv)
Endospermic seeds are found in
  • Barley
  • Castor
  • Pea
  • Both (a) and (b)
Careals, castor and coconut possess ______ seeds.
  • Endospermic
  • Zoospermic
  • Non-albuminous
  • None of these
The mature seeds of plants such as gram and peas, possess no endosperm, because
  • these plants are not angiosperms
  • there is no double fertilisation in them
  • endosperm is not formed in them
  • endosperm gets used up by the developing embryo during seed development.
Several pollen grains form a unit designated as pollinium in Family.
  • Asteraceae
  • Cucurbitaceae
  • Asclepiadaceae
  • Brassicaceae
Pollen grain is a.
  • Megaspore
  • Microspore
  • Microsporophyll
  • Microsporangium
________ of the pollen grain divides to form two male gametes.
  • Vegetative cell
  • Generative cell
  • Microspore mother cell
  • None of these
Spiny or sticky pollen grains and large, attractively colored flowers are associated with?
  • Hydrophily
  • Entomophily
  • Ornithophily
  • Anemophily
Plants with ovaries having only one or a few ovules are generally pollinated by _____________.
  • Bees
  • Butterflies
  • Birds
  • Wind
The inner most layer of anther is tapetum whose function is?
  • Dehiscence
  • Mechanical
  • Nutrition
  • Protection
In a fully developed male gametophyte the number of nuclei is?
  • One
  • Five
  • Three
  • Four
Identify the different parts of a typical dicot embryo labelled as A, B and C and select the correct option.
927687_5e138175773d46088f5d30125a422e4e.png
  • A-Plumule, B-Cotyledons, C-Radicle
  • A-Radicle, B-Cotyledons, C-Plumule
  • A-Cotyledons, B-Plumule, C-Radicle
  • A-Cotyledons, B-Radicle, C-Plumule
Study of pollen grains is called.
  • Micrology
  • Anthology
  • Palynology
  • Pomology
Embryo sac is to ovule as _________ is to an anther.
  • Stamen
  • Filament
  • Pollen grain
  • Androecium
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 12 Medical Biology Quiz Questions and Answers