Flower parts, aestivation and placentation — NEET & JEE Questions

Question 1 · difficulty L1 · recall

Which type of aestivation has the margins of adjacent petals or sepals touching without overlapping?

• A. Valvate
• B. Twisted
• C. Imbricate
• D. Vexillary

Question 2 · difficulty L2 · understanding

What is meant by axile placentation?

• A. Ovules are attached to a central axis in a multilocular ovary
• B. Ovules occur along the fused margin of one carpel
• C. Ovules arise from the inner wall of a unilocular ovary
• D. A single ovule is attached at the base of the ovary

Question 3 · difficulty L2 · understanding

Aestivation describes the arrangement of

• A. sepals or petals in a floral bud
• B. ovules inside the ovary
• C. roots around the stem
• D. stamens on the filament

Question 4 · difficulty L2 · understanding

Placentation refers to the arrangement of

• A. ovules within the ovary
• B. petals in the bud
• C. anthers on stamens
• D. leaves on a stem

Question 5 · difficulty L3 · understanding

$$\text { Match List I with List II : }$$ List I (Placentation) $$\begin{gathered} \text { List II } \\ \text { (Example) } \end{gathered}$$ A. Marginal I. Mustard B. Axile II. Pea C. Parietal III. Marigold D. Basal IV. Lemon Choose the correct answer from the options given below :

• A. A-II, B-IV. C-I, D-III
• B. A-I, B-III. C-II, D-IV
• C. A-III, B-I. C-IV, D-II
• D. A-IV, B-II. C-I, D-III

Question 6 · difficulty L3 · understanding

Match List-I with List-II : List - I List - II (A) China rose (I) Free central (B) Mustard (II) Basal (C) Primrose (III) Axile (D) Marigold (IV) Parietal Choose the correct answer from the options given below :

• A. A-IV, B-III, C-II, D-I
• B. A-II, B-III, C-IV, D-I
• C. A-III, B-IV, C-I, D-II
• D. A-III, B-IV, C-II, D-I

Question 7 · difficulty L3 · understanding

Which of the following examples show monocarpellary, unilocular ovary with many ovules? A. Sesbania B. Brinjal C. Indigofera D. Tobacco E. Asparagus Choose the correct answer from the options given below :

• A. B and E only
• B. C, D and E only
• C. A, B and D only
• D. A and C only

Question 8 · difficulty L3 · understanding

The ovary is half inferior in:

• A. Mustard
• B. Sunflower
• C. Plum
• D. Brinjal

Question 9 · difficulty L3 · application

A unilocular ovary bears ovules along the fused margins of a single carpel. Which placentation is present?

• A. Marginal
• B. Axile
• C. Parietal
• D. Basal

Question 10 · difficulty L4 · analysis

Flower P has each petal overlapping the next and being overlapped by the previous one in a regular direction. Flower Q has one large standard petal overlapping two wing petals, which in turn overlap the keel. Which aestivations are represented?

• A. Twisted and vexillary
• B. Valvate and imbricate
• C. Imbricate and twisted
• D. Vexillary and valvate