Download PDF
Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Reproduction in Flowering Plants of Biology.
(16)
Both, autogamy and geitonogamy are prevented in
[1]
Castor
[2]
Maize
[3]
Papaya
[4]
Cucumber
(17)
Embryo sac is also known as
[1]
Megagametophyte
[2]
Microgametophyte
[3]
Megasporangium
[4]
Microsporangium
(18)
IA hyaline, bisexual and self-fertilized flower that does not open at all, is
[1]
Chasmogamous
[2]
Apogamous
[3]
Cleistogamous
[4]
Polygamous
(19)
Fragrant flowers with well developed nectaries are adapted for
[1]
Anemophily
[2]
Zoophily
[3]
Hydrophily
[4]
Entomophily
(20)
What is the ratio of equational divisions that take place in Cycas and angiosperms respectively leading to the formation of male gametes from pollen grains?
[1]
2 : 1
[2]
3 : 1
[3]
3 : 2
[4]
2 : 3
21
Even in absence of pollinating agents seed-setting is assured in
[1]
Salvia
[2]
Fig
[3]
Commelina
[4]
Zostera
22
What is the function of germ pore?
[1]
Initiation of pollen tube
[2]
Absorption of water for seed germination
[3]
Emergence of radicle
[4]
Release of male gametes
Answer: Initiation of pollen tube
23
Axillary buds are used to raise crop of
[1]
Wheat
[2]
Rice
[3]
Groundnut
[4]
Sugarcane
24
In which of the following germination of embryo occurs, when fruit is still attached to the plant?
[1]
Mango
[2]
Mangove plants
[3]
Pinus
[4]
Pinus
25
Ornithophily refers to the pollination by which of the following:
[1]
Snails
[2]
Air
[3]
Insects
[4]
Birds
26
Which of the following pairs in angiosperms are diploid and triploid, respectively?
[1]
Polar nucleus and secondary nucleus
[2]
Microspore mother cell and egg cell
[3]
Secondary nucleus and endosperm
[4]
Endosperm and antipodal cells
Answer: Secondary nucleus and endosperm
27
Wind pollinated flowers are
[1]
Small, brightly coloured, producing large number of pollen grains
[2]
Small, producing large number of dry pollen grains
[3]
Small, producing nectar and dry pollen
[4]
Large, producing abundant nectar and pollen
Answer: Small, producing large number of dry pollen grains
28
Apomixis is a type of reproduction that results is the development of a/an
[1]
New organism without fusion of gametes
[2]
New organism from fusion products of gametes
[3]
Embryo from endosperm
[4]
Embryo from nucellus
Answer: New organism without fusion of gametes
29
Ovule is attached to the placenta of ovary wall by:
[1]
Funicle
[2]
Raphae
[3]
Hilum
[4]
Testa
30
Which of the following statements about sporopollenin is false?
[1]
Exine has apertures called germ pores where sporopollenin is present
[2]
Sporopollenin is one of the resistant organic materials
[3]
Exine is made up of sporopollenin
[4]
Sporopollenin can withstand high temperatures and strong acids
Answer: Exine has apertures called germ pores where sporopollenin is present
Please share this page
Chapters