Q.2 Embryo sac is to ovule as ......... is to an anther.

1. stamen

2. filament

3. pollen grain

4. androecium

Subtopic:  Stamen: Anther | Pistil: Ovule |
 76%
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A dicotyledonous plant bears flowers, but never produces fruits and seeds. The most probable cause for the above situation is

1. plant is dioecious and bears only pistillate flowers
2. plant is dioecious and bears both pistillate and staminate flowers
3. plant is monoecious —
4. plant is dioecious and bears only staminate flowers

Subtopic:  Pollination & Outbreeding Devices |
 63%
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The outermost and innermost wall layers of microsporangium in an anther are respectively.

1. Endothecium and tapetum

2. Epidermis and endodermis

3. Epidermis and middle layer

4. Epidermis and tapetum

Subtopic:  Stamen: Microsporangium |
 88%
From NCERT
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During microsporogenesis, meiosis occurs in

1. endothecium

2. microspore mother cells

3. microspore tetrads

4. pollen grains

Subtopic:  Stamen: Microsporangium |
 91%
From NCERT
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From among the sets of terms given below, identify those that are associated with the gynoecium :

1. Stigma, ovule, embryo sac, placenta

2. Thalamus, pistil, style, ovule

3. Ovule, ovary, embryo sac, tapetum

4. Ovule, stamen, ovary, embryo sac

Subtopic:  Pistil: Ovule |
 79%
From NCERT
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Starting from the innermost part, the correct sequence of parts in an ovule is

1. egg, nucellus, embryosac, integument

2. egg, embryosac, nucellus, integument

3. embryosac, nucellus, integument, egg

4. egg, integument, embryo sac, nucellus

Subtopic:  Pistil: Ovule |
 71%
From NCERT
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From the statements given below choose the option that is true for a typical female gametophyte.

i. It is eight-nucleate and seven-celled at maturity.
ii. It is free-nuclear during the development.
iii. It is situated inside the integument, but outside the nucellus.
iv. It has an egg apparatus situated at the chalazal end.

1. (i) and (iv)             

2. (ii) and (iii)

3. (i) and (ii)                       

4. (ii) and (iv)

Subtopic:  Pistil: Female Gametophyte |
 83%
From NCERT
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Autogamy can occur in a chasmogamous flower if

1. pollen matures before maturity of ovule

2. ovules mature before maturity of pollen

3. both pollen and ovules mature simultaneously

4. both anther and stigma are of equal lengths

Subtopic:  Pollination & Outbreeding Devices |
 88%
From NCERT
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Choose the correct statement from the following : 
 
1. Cleistogamous flowers always exhibit autogamy
2. Chasmogamous flowers always exhibit geitonogamy 
3. Cleistogamous flowers exhibit both autogamy  geitonogamy 
4. Chasmogamous flowers never exhibit autogamy
Subtopic:  Pollination & Outbreeding Devices |
 87%
From NCERT
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Q. 12 A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and feathery. These modifications facilitate pollination by
1. insects     

2. water     

3. wind     

4. animals

Subtopic:  Pollination & Outbreeding Devices |
 93%
From NCERT
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