11 Bio Botany Lesson 4 Book Back Q&A English


Chapter-4.Reproductive Morphology 

Book Back Questions & Answers

2021 - 22

Choose the correct answer

1.Vexillary aestivation is characteristic of the family 

a. Fabaceae         b. Asteraceae         c. Solanaceae         d. Brassicaceae 

2.Gynoecium with united carples is termed as 

a. Apocarpous     b. Multicarpellary     c. Syncarpous     d. None of the above 

3.Aggregate fruit develops from 

a. Multicarpellary, apocarpous ovary 

b. Multicarpellary, syncarpous ovary 

c. Multicarpellary ovary 

d. Whole inflorescence 

4.In an inflorescence where flowers are borne laterally in an acropetal succession the position of the youngest floral bud shall be 

a. Proximal                 b. Distal                 c. Intercalary                 d. Anywhere 

5.A true fruit is the one where 

a. Only ovary of the flower develops into fruit 

b. Ovary and calyx of the flower develops into fruit 

c. Ovary, calyx and thalamus of the flower develops into fruit 

d. All floral whorls of the flower develops into fruit 

Two, Three, Five mark questions

6.Find out the floral formula for a bisexual flower with bract, regular, pentamerous, distinct calyx and corolla, superior ovary without bracteole. 

7.Give the technical terms for the following: - a. A sterile stamen b. Stamens are united in one bunch c. Stamens are attached to the petals. 

a. A sterile stamen – Staminode. 

b. Stamens are united in one bunch – Monadelphous. 

c. Stamens are attached to the petals – Epipetalous.

8.Explain the different types of placentation with example. 

1.Axil placentation: 

Placenta arises from the column in a compound ovary with septa. Example: Hisbiscus, Tomato. 

2.Marginal placentation: 

Placenta with the margin of a unicarpellate ovary. Example: Fabaceae

3.Parietal placentation: 

Placenta on the ovary wall. Example: Mustard, Cucumber. 

4.Basal placentation: 

Placenta at the base of the ovary. Example: Sunflower. 

5.Superficial placentation: 

Ovules arise from the surface of the septa. Example: Nymphaeaceae.

9.Differentiate between aggregate fruit with multiple fruit.

S.No Aggregate fruit Multiple fruit
1 Aggregate fruits develop from a single flower with apocarpous pistil Multiple fruits develop from the whole inflorescence along with peduncle
2 Each free carpels are develops into a simple fruitlets. Flowers fused together by succulent perianth.
3 A collection of simple fruitlets makes an Aggregate fruit Whole inflorescence forms a compact structure is called Multiple fruit.
4 Example: Annona, Polyalthia. Example: Jack fruit, Pine apple

10.Explain the different types of fleshy fruit with suitable example. 
1.The fruits are derived from single pistil. 
2.The pericarp is fleshy, succulent and differentiated into epicarp, mesocarp and endocarp. 
3.It is subdivided into the following types. 
a) Berry: 
1.Fruit develops from bicarpellary or multicarpellary, syncarpous ovary. 
2.Example: Tomato, Grapes, Brinjal. 
b) Drupe: 
1.Fruit develops from monocarpellary, superior ovary. 
2.Example: Mango, Coconut. 
c) Pepo: 
1.Fruit develops from tricarpellary inferior ovary. 
2.Example: Cucumber, Watermelon, Bottle gourd, Pumpkin. 
d) Hesperidium: 
1.Fruit develops from multicarpellary, multilocular, syncarpous, superior ovary. 
2.Example: Orange, Lemon. 
e) Pome: 
1.Fruit develops from multicarpellary, syncarpous, inferior ovary. 
2.Example: Apple, Pear.

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