In double fertilization total number of male nuclei and total number of female nuclei involved are:

(1) 3, 2 respectively                          

(2) 2, 3 respectively

(3) 2, 2 respectively                          

(4) 3, 3 respectively

Subtopic:  Double Fertilization |
 80%
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A homogamous tall pistillate plant (TT) is crossed with homogamous dwarf staminate plant (tt). What is the genotype of endosperm?

(1) TTT                 

(2) TTt                 

(3) Ttt                            

(4) ttt

Subtopic:  Endosperm |
 78%
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For artificial hybridisation experiment in bisexual flower, which of the sequences is correct?
(1) Bagging → Emasculation → Cross pollination → Rebagging

(2) Emasculation → Bagging → Cross pollination → Rebagging

(3) Cross pollination → Bagging → Emasculation → Rebagging

(4) Self-pollination → Bagging → Emasculation → Rebagging

Subtopic:  Pollination & Outbreeding Devices |
 88%
From NCERT
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Which of the following is false?

I. Endosperm formation starts prior to first division of zygote

II. Angiospermic endosperm is mostly 3N while gymnospermic one is N.

III. The most common type of endosperm is nuclear.

IV. Coconut has both liquid nuclear (multinucleate) and cellular endosperm.

V. Milky water of green tender coconut is liquid female gametophyte.

(1) I and II only   

(2) III only           

(3) V only             

(4) II only

Subtopic:  Endosperm |
 71%
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Diagram given below shows stages in embryogenesis in a typical dicot (Capsella). Identify structures A to D respectively:



1. Suspensor, Radicle, Plumule, Cotyledons
2. Hypophysis, Radicle, Plumule, Cotyledons
3. Suspensor, Plumule, Radicle, Cotyledons
4. Suspensor, Radicule, Plumule, Hypocotyls

Subtopic:  Embryo |
 63%
From NCERT
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Go through the given diagram of a typical dicot embryo. In which of the following all the 3 parts labelled as A, B, C with their respective functions are correctly identified?

A B C
1. Plumule,
shoot system
formation
Radicle,
root system
formation
Hypophysis,
formation of
radicle
2. Plumule,
shoot system
formation
Radicle,
root system
formation
Cotyledon,
food storage
3. Radicle,
root system
formation
Plumule,
shoot system
formation
Cotyledon,
food storage
4. Radicle,
root system
formation
Plumule,
shoot system
formation
Endosperm,
food storage
Subtopic:  Embryo |
 85%
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Which are the external conditions required for seed germination:
(1) Oxygen, carbon dioxide and suitable temperature

(2) Oxygen, light and suitable temperature

(3) Light, moisture and suitable temperature

(4) Oxygen, moisture and suitable temperature

Subtopic:  Seed |
 62%
From NCERT
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Which of the following is not correct?
(1) As the seed matures, its water content is reduced and seeds become relatively dry(10-15% moisture by mass)

(2) The seed dormancy is the internal or innate inhibition of generation of normal or viable seeds

(3) Embryo in dormant seed shows higher rate of general metabolic rate

(4) Because of dormancy seeds remain viable for longer period and can be stored

Subtopic:  Embryo | Seed |
 75%
From NCERT
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Which of the following will lose its economic value if fruits are produced through parthenocarpy:

(1) Citrus             

(2) Banana           

(3) Grape             

(4) Pomegranate

Subtopic:  Apomixis & Polyembryony |
 57%
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Which of the following statements is false?
 

1. Some 2000 years old viable seeds of Pheonix dactylifera were discovered during archaeological excavation of King Herod's palace near Dead Sea
2. Record of 10,000 years of dormancy of seeds has been estimated in Lupinus arcticus
3. The number of seeds in each fruit in case of orchid and some parasitic forms like Orobanche and Striga is one
4. Many fruits have evolved mechanisms for dispersal of seeds
Subtopic:  Apomixis & Polyembryony |
 80%
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