NEET : Multiple Choice questions: Aestivation and Placentation in Flower
1. The arrangement of sepals or petals in flower bud with respect to other floral parts is called as
A. Venation
B. Aestivation
C. Phyllotaxy
D. Placentation
Answer : B Explanation
2. Which one of the following pair is not a type of Aestivation.
A. Marginal and Parietal
B. Imbricate and vexillary
C. Valvate and Twisted
D. Vexillary and Papilionaceous
Answer : A Explanation
3. When sepals or petals in Whorl are located very close to each other without overlapping than Aestivation is said to be
A. Valvate
B. Imbricate
C. Vexillary
D. Twisted
Answer : A Explanation
4. Valvate Aestivation is found in
A. Calotropis B. Pea
C. Cotton D. Bean
Answer : A Explanation
5. If margin of sepals or petals are overlapped to each other but in fixed direction than Aestivation is
A. Valvate
B. Imbricate
C. Vexillary
D. Twisted
Answer : D Explanation.
6. Twisted Aestivation is not found in
A. Cassia B. China rose
C. Cotton D. Lady finger
Answer : A Explanation
7. In Imbricate Aestivation, margin of sepals or petals are overlapped to each other in fixed direction found in
A. Pea and Bean
B. Cassia and Gulmohar
C. Cotton and China rose
D. Calotropis and Guava
Answer : B Explanation
8. The numbers of petals are present in vexillary Aestivation
A. Three B. One
C. Five D. Multiple
Answer : C Explanation
9. The vexillary Aestivation is found in
A. Pea and Bean
B. Cassia and Gulmohar
C. Cotton and China rose
D. Calotropis and Guava
Answer : A Explanation
10. Which one of following statement is not correct for the vexillary Aestivation.
A. Standard is largest petal which overlaps two lateral petal called wings.
B. Wings are lateral petal which overlaps two smallest petals called keel.
C. The total number of standard petals are four.
D. Vexillary Aestivation is also called as Papilionaceous Aestivation.
Answer : C Explanation
11. The arrangement of ovule in ovary is called as
A. Venation
B. Aestivation
C. Phyllotaxy
D. Placentation
Answer : D Explanation
12. Which one of the following pair is not a type of Placentation.
A. Opposite and Alternate
B. Marginal and axial
C. Central and free central
D. Basal and Parietal
Answer : A Explanation
13. In Which of the following placentation, placenta form a ridge on ventral side of ovary and ovule are attached in two row.
A. Axial B. Central
C. Free central D. Marginal
Answer : D Explanation
14. In axile placentation, A.Ovules are arranged in multilocular ovary.
B. .Ovules are arranged in unilocular ovary
C. Ovules are arranged in ventral ridge of ovary
D. Single ovule is present in ovary
Answer : A Explanation
15. Consider the following examples which have axile placentation and select the correct code
1. Gulmohar
2. Cotton
3. Lady finger
4. China rose
A. 1, 2 and 3 B.2, 3 and 4
C. 1, 2 and 4. D.1, 2,3and 4
Answer : B Explanation
16. Consider the following feature of Parietal placenta and select the correct code
1. Ovule are on inner wall of ovary
2. False septa are absent
3. Single or two chamber ovary
A. 1 and 3 B. 2 and 3
C. Only 3 D. 1, 2 and 3
Answer : D Explanation
17. Parietal Placenta are found in
A. Pea and Bean
B. Cotton and cassia
C. Mustard and Argemone
D. Calotropis and china rose
Answer : D Explanation
18. Which of the following statement is not correct about the free central placentation.
A. Ovary is multilocular.
B. Septa is absent.
C.Presence of ovule on central axis
D . Present in Dianthus and Primrose
Answer : A Explanation
19. In marigold and sunflower, Presence of single ovule in ovary signifies
A. Axile placentation
B. Basal placentation
C. Parietal placentation
D. Marginal placentation
Answer : B Explanation
20. Identify the type of placentation in given diagram
A B
A. Axile Parietal
B. Parietal Axile
C. Axile Basal
D. Parietal Basal
Answer : D Explanation
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