|
Why is sporopollenin considered the most resistant material
|
|
0
|
2991
|
August 27, 2016
|
|
Draw a labelled diagram of the sectional view of a mature pollen grain of angiopserms.Explain the function of any two of its parts
|
|
1
|
6956
|
August 27, 2016
|
|
Why are angiosperm anther called dithecous?Describe the structure of its microsporganism
|
|
0
|
10123
|
August 27, 2016
|
|
State one advantage and one disadvantage of cleistogamy
|
|
0
|
751
|
August 27, 2016
|
|
Where is sporopollenin present in plants?State its significance with reference to its chemical nature
|
|
0
|
1900
|
August 27, 2016
|
|
Name the organic material exine and intine of an angiosperm pollen grain are made up of.Explain the role of exine
|
|
0
|
4762
|
August 27, 2016
|
|
Draw a well labelled diagram of a typical anatropous ovule
|
|
0
|
11679
|
August 27, 2016
|
|
Why do corn-cobs have long tasses?
|
|
0
|
4359
|
August 27, 2016
|
|
Viola and Oxalis produce two types of flower,one is chasmogamous flower.Name the other types
|
|
0
|
2070
|
August 27, 2016
|
|
How many haploid cells are present in a mature femlae gametophyte of a flowering plant?Name them
|
|
0
|
486
|
August 27, 2016
|
|
A bi lobed,discotheques anther has 100 micro spore mother cells per microsporangium
|
|
0
|
481
|
August 27, 2016
|
|
An another with a malfunctioning tapetum often fails to produce viable male gametophytes. Give any one reason
|
|
0
|
882
|
August 27, 2016
|
|
Give an example of a plant that came to India as a contaminant and is a cause of pollen allergy
|
|
0
|
1409
|
August 27, 2016
|
|
Name the part of the flower which the tassels of the corn-cob represent
|
|
0
|
7566
|
August 27, 2016
|
|
Draw a diagram of microspore of an angiosperm.Label its cellular components only
|
|
0
|
7496
|
August 27, 2016
|
|
State the fucntion of filiform apparatus found in nautre embryo sac of an angiosperm
|
|
0
|
512
|
August 27, 2016
|