Which of the following statement is not associated with phenomenon of flowering?
(1) Decision for flowering takes place much before actual flower appears.
(2) During flowering several structural and hormonal changes takes place
(3) During flowering differentiation takes place
(4) Flowering is independent of environmental factors
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen anther is young a group of compactly arranged homogenous cells are present in centre it is known as
(1) Sporogenous tissue
(2) Potential pollen mother cell
(3) Both 1 and 2
(4) Conjunctive tissue
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch the column with respect to pollen grain:
|
Column I |
|
Column II |
a) |
Vegetative Cell Nucleus |
(i) |
Abundant Reserve Food & Irregular Nucleus |
b) |
Germ Pore |
(ii) |
Spindle shaped with dense cytoplasm |
c) |
Exine |
(iii) |
Where the Sporopollenin is absent |
|
|
(iv) |
Variable Pattern & design |
|
|
(v) |
Continuous layer made up of Cellulose & pectin |
(1) a(iv), b(v), c(iii)
(2) a(i), b(iii), c(v)
(3) a(i), b(iii), c(iv)
(4) a(iv), b(i), c(iii)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFind 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGynoecium of Michelia and Papaver is similar in being
(1) Apocarpous
(2) Syncarpous
(3) Monocarpellary
(4) Polycarpellary
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFossilization of pollen grains is helped by
(1) Compatible protein
(2) Sporopollenin
(3) Cellulose
(4) Pectin
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGenetically 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRead 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn which organ the growth of pollen tube is observed, till it reaches the ovules?
A.Pollen tube
B.Style
C.Ovary
D.Stigma
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology