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Why is sporopollenin considered the most resistant material
|
|
0
|
2923
|
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
|
6854
|
August 27, 2016
|
|
Why are angiosperm anther called dithecous?Describe the structure of its microsporganism
|
|
0
|
10078
|
August 27, 2016
|
|
State one advantage and one disadvantage of cleistogamy
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|
0
|
728
|
August 27, 2016
|
|
Where is sporopollenin present in plants?State its significance with reference to its chemical nature
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|
0
|
1865
|
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
|
4717
|
August 27, 2016
|
|
Draw a well labelled diagram of a typical anatropous ovule
|
|
0
|
11508
|
August 27, 2016
|
|
Why do corn-cobs have long tasses?
|
|
0
|
4297
|
August 27, 2016
|
|
Viola and Oxalis produce two types of flower,one is chasmogamous flower.Name the other types
|
|
0
|
2037
|
August 27, 2016
|
|
How many haploid cells are present in a mature femlae gametophyte of a flowering plant?Name them
|
|
0
|
466
|
August 27, 2016
|
|
A bi lobed,discotheques anther has 100 micro spore mother cells per microsporangium
|
|
0
|
447
|
August 27, 2016
|
|
An another with a malfunctioning tapetum often fails to produce viable male gametophytes. Give any one reason
|
|
0
|
842
|
August 27, 2016
|
|
Give an example of a plant that came to India as a contaminant and is a cause of pollen allergy
|
|
0
|
1376
|
August 27, 2016
|
|
Name the part of the flower which the tassels of the corn-cob represent
|
|
0
|
7528
|
August 27, 2016
|
|
Draw a diagram of microspore of an angiosperm.Label its cellular components only
|
|
0
|
7368
|
August 27, 2016
|
|
State the fucntion of filiform apparatus found in nautre embryo sac of an angiosperm
|
|
0
|
485
|
August 27, 2016
|