What is the number of microsporangia in each lobe of an angiosperm anther?

(1) Four

(2) Two

(3) Eight

(4) One

Subtopic:  Stamen: Anther | Stamen: Microsporangium |
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NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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Which among the following extend longitudinally to become pollen sac?

(1) Microsporangia

(2) Filament of anther

(3) Tapetum

(4) Endothecium

Subtopic:  Stamen: Anther | Stamen: Microsporangium |
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NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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Which among the following is not a feature of anther?

(1) Bilobed

(2) Dithecous

(3) Apocarpous

(4) Tetragonal

Subtopic:  Stamen: Anther |
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NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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Which among the following is not a wall layer of microsporangium?

(1) Endothecium

(2) Nucellus

(3) Tapetum

(4) Middle layers

Subtopic:  Stamen: Microsporangium | Pistil: Ovule |
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NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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All of the following statements are correct except:

(1) The proximal end of the filament is attached to the thalamus or the petal of the flower.

(2) The anther is a four-sided structure consisting of four microsporangia, two in each lobe.

(3) The number and length of stamens are variable in flowers of different species.

(4) In a longitudinal section, a typical microsporangium appears near circular in outline.

Subtopic:  Stamen: Microsporangium |
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NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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Which among the following statement is incorrect with respect to tapetum?

(1) It nourishes developing pollen grains. 

(2) It has dense cytoplasm.

(3) It is the innermost wall layer of microsporangia.

(4) Cells have single nucleus only. 

Subtopic:  Stamen: Microsporangium |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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How tapetal cells become binucleate?

(1) Meiosis-I

(2) Mitosis

(3) Endomitosis

(4) Eumitosis

Subtopic:  Stamen: Anther | Stamen: Microsporangium |
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NEET 2022 - Target Batch - Aryan Raj Singh

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Match the following:

1   

Sporogenous tissue    

I

Process of formation of microspores from PMC by meiosis

2

Microspore tetrad

II

Microspores arranged in cluster of four cells

3

Microsporogenesis

III

Formation of microspore tetrad by meiosis

4

Tapetum

IV   

Nourishes pollen grains

(1) 1-III ; 2-I ; 3-II ; 4-IV 

(2) 1-III ; 2-II ; 3-I ; 4-IV

(3) 1-II ; 2-III ; 3-I ; 4-IV

(4) 1-II ; 2-III ; 3-IV ; 4-I

Subtopic:  Stamen: Anther | Stamen: Microsporangium |
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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Which among the following is incorrect with respect to microsporogenesis? 

(1) The cells of the sporogenous tissue undergo mitotic divisions to form microspore tetrads.

(2) Each cell of the sporogenous tissue is capable of giving rise to a microspore tetrad. Each one is a potential pollen or microspore mother cell (PMC).

(3) The microspores are arranged in a cluster of four cells called as the microspore tetrad.

(4) Inside each microsporangium several thousands of microspores or pollen grains are formed that are released with the dehiscence of anther.

Subtopic:  Stamen: Microsporangium |
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NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
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The inner wall of pollen grains is made up of 

(1) Sporopollenin

(2) Cellulose and pectin

(3) Peptidoglycan

(4) Cellulose only

Subtopic:  Stamen: Male Gametophyte |
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NEET 2022 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2022 - Target Batch - Aryan Raj Singh

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