Short Answer TypeIshwar was reading a chapter on the function of different parts of a green plant. His mother asked him about the functions of roots. He replied that roots are meant for anchorage and absorbing water and minerals from the soil. Then mother showed him radish, carrot, and turnip and asked him about the additional functions that the roots perform.
Read the above passage and answer the following questions:-
I. What is the special function of roots in above examples?
II. What other secondary functions roots are known to perform?
Give the technical terms for the following
a. A sterile stamen.
b. Stamens are united in one bunch
c. Stamens are attached to Petals.
Long Answer TypeDistinguish between families fabaceae, solanaceae, liliaceae on the basis of gynoecium characteristics. Also write economic importance of any one of the above family.
| Family | Characteristics of Gynoecium |
| Fabaceae | Monocarpellary, ovary unilocular, marginal placentation |
| Solanaceae | Bicarpellary syncarpous, carpels placed obliquely, bilocular, axile placentation |
| Liliaceae | Tricarpellary, syncarpous, ovary superior, axile placentation |
b. The economic importance of Fabacae.
i. They act as sources of protein. (pulses - gram, arhar)
ii. They used for the production of edible oil like that of soyabean, groundnut etc.
iii. Used for the production of dye (Indigofera)
iv. They provide fibres like the plant sunhemp)
v. They provide fodder (Sesbania, Trifolium)
vi. They are grown as ornamental plants (lupin)
vii. They produce medicine.
Short Answer TypeThe arrangement of ovules within the ovary is known as placentation.
What does the term placenta refer to?
Name the different types of placentation seen in plants.
Tendrils are found in the following plants. Identify whether they are stem
tendrils or leaf tendrils.
a. Cucumber
b. Peas
c. Pumpkins
d. Grapevine
e. Watermelons
Tendrils of grapevines are homologous to the tendril of pumpkins but are analogous to that of pea. Justify the above statement.
Rhizome of ginger is like the roots of other plants that grows underground. Despite this, ginger is a stem and not a root. Justify.
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