A typical angiosperm anther is bilobed with each lobe having two theca i.e. dithecous. Theca is separated often by :
1. A longitudinal groove running lengthwise.
2. A longitudinal groove running breadth wise.
3. A transverse groove running breadth wise.
4. A transverse groove running lengthwise.

Subtopic:  Stamen: Anther |
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Four statements are given below. How many of them are correct?
(1) The anther is a tetragonal structure, with four microsporangia at corners, two in each lobe.
(2) Microsporangia develops further and becomes a pollen sacs.
(3) A typical microsporangia is surrounded by four layered wall, 3-protective and 1 nutritional.
(4) The nutritive layer is densely cytoplasmic with more than one nucleus

Options :

1. 3                         
2. 4
3. 2                         
4. 1

Subtopic:  Stamen: Anther | Stamen: Microsporangium |
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Which of the following statement is not correct for pollen grain?
1. It represents male gametophyte.
2. It is a spherical structure, about 25-50 micrometers in diameter.
3. Pollen grains are rich in nutrients.
4. In family rosaceae, leguminoseae and solanaceae pollen lose viability in 30 minute.

Subtopic:  Stamen: Male Gametophyte |
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In which organ the growth of pollen tube is observed, till it reaches the ovules?

A.Pollen tube

B.Style

C.Ovary

D.Stigma

Subtopic:  Pollen - Pistil Interaction |
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Read the statements and select option representing correct statements with respect to stamen.
A. The distal end of filament is attached to thalamus.
B. A typical anther is dithecous and bisporangiate.
C. Connective is sterile vasculated tissue.
D. Microsporangia develop further and become pollen sacs.

1. A & B

2. A & C

3. B & C

4. C & D

Subtopic:  Stamen: Anther | Stamen: Microsporangium |
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Genetically and functionally self-pollination is cent percent ensured with seed formation even in the absence of pollinators by

(1) Bisexuality

(2) Dicliny

(3) Geitonogamy

(4) Cleistogamy

Subtopic:  Pollination & Outbreeding Devices |
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How many statement(s) is/are correct for pollen grains?
a. Parthenium is a cause of bronhial afflictions
b. Intine exhibits fascinating array of patterns and designs
c. Cytoplasm of pollen grain is s urrounded by spermoderm
d. Generative cell is present when pollens are shed in 40 percent plants.

1. One

2. Two

3. Three

4. Four

Subtopic:  Stamen: Male Gametophyte |
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Fossilization of pollen grains is helped by

(1) Compatible protein  

(2) Sporopollenin

(3) Cellulose

(4) Pectin

Subtopic:  Stamen: Male Gametophyte |
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Gynoecium of Michelia and Papaver is similar in being

(1) Apocarpous                 

(2) Syncarpous

(3) Monocarpellary         

(4) Polycarpellary

 

Subtopic:  Pistil: Ovule |
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Find incorrect statement:

(1) A polycarpellary, apocarpous gynoecium is found in Michelia

(2) Many ovules are present in an ovary of papaya and orchids

(3) Yellowish, powdery pollen grains found in Hibiscus

(4) The more pistils may be fused together to form monocarpellary syncarpous gynoecium

 

Subtopic:  Pistil: Ovule |
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