Which of the following options is correct?
(1) Pollination gives the guarantee of the promotion of post-pollination events that lead to fertilization

(2) The events – “from pollen deposition on stigma until pollen tubes enter the ovule" are together referred to as pollen-pistil interaction

(3) Pollen-pistil interaction is a dynamic process involving pollen recognition followed by only promotion (not rejection) of the pollen

(4) Pistil has no ability to recognize the pollen, whether right or wrong type

Subtopic:  Pollination & Outbreeding Devices | Post Pollination Events |
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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 |
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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 |
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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 |
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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 |
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Diagram given below shows stages in embryogenesis in a typical dicot (Capsella). Identify structures A to D respectively:



(a) Suspensor, Radicle, Plumule, Cotyledons
(b) Hypophysis, Radicle, Plumule, Cotyledons
(c) Suspensor, Plumule, Radicle, Cotyledons
(d) Suspensor, Radicule, Plumule, Hypocotyls

Subtopic:  Embryo |
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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

(a)

Plumule,

shoot system

formation

Radicle,

root system

formation

Hypophysis,

formation of

radicle

(b)

Plumule,

shoot system

formation

Radicle,

root system

formation

Cotyledon,

food storage

(c)

Radicle,

root system

formation

Plumule,

shoot system

formation

Cotyledon,

food storage

(d)

Radicle,

root system

formation

Plumule,

shoot system

formation

Endosperm,

food storage

Subtopic:  Embryo |
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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 |
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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 |
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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 |
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