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Sexual Reproduction In Flowering Plants

554 Questions Start Allen Test
All Exams Allen Errorless
Kerala PMT 2010 Q51 Errorless Microsporogenesis MCQ
Which of the following statement about sporopollenin is false
A.
Exine is made up of sporopollenin
B.
Sporopollenin is one of the resistant organic materials
C.
Exine has apertures called germ pores where sporopollenin is present
D.
Sporopollenin can withstand high temperatures and strong acids
E.
No enzyme that degrades sporopollenin is so far known
DUMET 2010 Q52 Errorless Microsporogenesis MCQ
Which of the following wall layers of anther play a predominant role in its dehiscence
A.
Epidermis
B.
Endothecium
C.
Middle layers
D.
Tapetum
DUMET 2010 Q53 Errorless Microsporogenesis MCQ
At the time of shedding the number of nuclei present in an angiosperm pollen grain is
A.
One
B.
One or two
C.
Two or three
D.
Only two
Kerala PMT 2010 Q54 Errorless Megasporogenesis MCQ
In the diagram given above, parts labelled as 'A', 'B', 'C', 'D', 'E' and 'F are respectively identified as
A.
Synergids, polar nuclei, central cell, antipodals, filiform apparatus and egg
B.
Polar nuclei, egg, antipodals, central cell, filiforms apparatus and synergids
C.
Egg, synergids, central cell, filiform aparatus, antipodals and polar nuclei
D.
Central cell, polar nuclei, filiform apparatus, antipodals, synergids and egg
E.
Filiform apparatus, polar nuclei, egg, antipodals, synergids and central cell
Odisha JEE 2010 Q55 Errorless Megasporogenesis MCQ
Select the incorrect statement regarding angiosperm
A.
Megaspore is diploid
B.
Megaspore is the first cell of the female gametophyte
C.
The pollen grain is the first cell of the male gametophyte
D.
All of the above
Kerala PMT 2010 Q56 Errorless POLLINATION MCQ
Which of the following is pollinated by water [NCERT Pg. No. 13]
A.
Viola
B.
Yucca
C.
Oxalis
D.
Commelina
E.
Zostera
CBSE PMT (Pre.) 2010 Q57 Errorless POLLINATION MCQ
Wind pollinated flowers are
A.
Small, producing nectar and dry pollen
B.
Small, brightly coloured, producing large number of pollen grains
C.
Small, producing large number of dry pollen grains
D.
Large producing abundant nectar and pollen
Kerala PMT 2010; AIPMT 2015 Q58 Errorless Embryo and endosperm MCQ
The monocotyledonous seed (wheat grain) consists of one large and shield shaped cotyledon known as
A.
Aleurone layer
B.
Scutellum
C.
Coleoptile
D.
Hilum
E.
Coleorhiza
CBSE PMT (Pre.) 2010 Q59 Errorless Embryo and endosperm MCQ
Apomictic embryos in citrus arise from
A.
Diploid egg
B.
Synergids
C.
Maternal sporophytic tissue in ovule
D.
Antipodal cells
Kerala PMT 2010 Q60 Errorless Critical Thinking MCQ
Pick out wrong statement
A.
Double fertilization is unique to gymnosperms and monocotyledons
B.
Sequoia, a gymnosperm, is one of the tallest tree
C.
Phaeophyceae members possess chlorophyll a, c, carotenoids and xanthophylls
D.
Moss is a gametophyte which consists of two stages namely, protonema stage and leafy stage
E.
Evolutionarily, pteridophytes are the first terrestrial plants to possess xylem and phloem
Odisha JEE 2010 Q61 Errorless Self Evaluation Test MCQ
Feathery stigma is called
A.
Spur
B.
Stylopodium
C.
Plumose
D.
Calyculus
EAMCET 2009 Q62 Errorless Microsporogenesis MCQ
There are 10 flowers in one individual plant of Crotalaria. In each microsporangium of every stamen of all the flowers, there are 30 microspore mother cells. How many pollen grains are formed from that plant
A.
4,000
B.
10,000
C.
24,000
D.
48,000
KCET 2009 Q63 Errorless Microsporogenesis MCQ
Pollen grains of a plant whose 2n = 28 are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus
A.
28
B.
21
C.
14
D.
56
WB JEE 2009; BHU 2012 Q64 Errorless Microsporogenesis MCQ
Sporopollenin is chemically
A.
Homopolysaccharide
B.
Fatty substance
C.
Protein
D.
Heteropolysaccharide
Kerala PMT 2009 Q65 Errorless Megasporogenesis MCQ
Which one of the following statements is not true [NCERT Pg. No. 11]
A.
Pollen grains are released from anthers at 2-celled state
B.
Sporogenous cell directly behaves as the megaspore mother cell
C.
Megaspore divides twice to form an eight nucleate embryosac
D.
Egg and synergids always lie near the micropylar end of ovule
E.
Endosperm is triploid
DUMET 2009; NEET 2013 Q66 Errorless POLLINATION MCQ
One advantage of cleistogamy is
A.
It leads to greater genetic diversity
B.
Seed dispersal is more efficient and widespread
C.
Seed set is not dependent on pollinators
D.
Each visit of a pollinator results in transfer of hundreds of pollen grains
AMU (Med.) 2009 Q67 Errorless FERTILIZATION MCQ
In a mature embryo sac the central cell is
A.
Single nucleate
B.
Binucleate
C.
Four nucleate
D.
Eight nucleate
EAMCET 2009 Q68 Errorless Critical Thinking MCQ
Arrange the following in the order of their location from periphery to centre in the entire dicotyledonous plant body
(I) Fusiform cells
(II) Trichoblasts
(III) Collocytes
(IV) Tyloses The correct sequence is
A.
IV, I, II, III
B.
II, III, I, IV
C.
III, II, I, IV
D.
I, IV, III, II
Odisha JEE 2009 Q69 Errorless Critical Thinking MCQ
Embryo axis above the cotyledon is called as
A.
Epicotyl
B.
Hypocotyl
C.
Funicle
D.
Raphe
CBSE PMT 2008 Q70 Errorless Microsporogenesis MCQ
Which one of the following is resistant to enzyme action
A.
Pollen exine
B.
Leaf cuticle
C.
Cork
D.
Wood fibre
CBSE PMT 2008 Q71 Errorless Megasporogenesis MCQ
What does the filiform apparatus do at the entrance into ovule [NCERT Pg. No. 17] Or Function of filiform apparatus is to [CBSE PMT 2014]
A.
It brings about opening of the pollen tube
B.
It guides pollen tube from a synergid to egg
C.
It helps in the entry of pollen tube into a synergid
D.
It prevents entry of more than one pollen tube into the embryo sac
CBSE PMT 2008 Q72 Errorless POLLINATION MCQ
Unisexuality of flowers prevents
A.
Geitonogamy, but not xenogamy
B.
Autogamy and geitonogamy
C.
Autogamy, but not geitonogamy
D.
Both geitonogamy and xenogamy
Kerala PMT 2008 Q73 Errorless POLLINATION MCQ
Choose the mis-matched option
A.
Wind - Cannabis - anemophily
B.
Water ā€“ Zoostera ā€“ hydrophily
C.
Insects - Salvia - entomophily
D.
Birds ā€“ Adansonia ā€“ ornithophily
E.
Bats ā€“ Kigelia ā€“ chiropterophily
J & K CET 2008 Q74 Errorless POLLINATION MCQ
Which one of the following is an example of cleistogamy Or Even in absence of pollinating agents seed setting is assured in [CBSE PMT (Pre.) 2012; KCET 2018]
A.
Sunflower
B.
Vallisneria
C.
Commelina
D.
Calatropis
BHU 2008 Q75 Errorless POLLINATION MCQ
Which prevents self pollination Or Main condition for a plant to perform cross pollination is
A.
Self sterility
B.
Herkogamy
C.
Dichogamy
D.
All of the above