The underground stem of some plants such as grasses, strawberry is concerned with
(a) Perennation.
(b) Vegetative propagation.
(c) Moisture absorption.
(d) Food assimilation.
(e) Spread to new niches.
Important Questions on Morphology of Flowering Plants
Select the option that is correct for the description of subaerial modification.
(a) A slender lateral branch arises from the base of the main axis and, after growing aerially for some time, arches downwards to touch the ground.
(b) A lateral branch originates from the basal and underground portion of the main stem, grows horizontally beneath the soil, and comes out obliquely upwards, giving rise to a leafy shoot.
The type of sub-aerial stem modification depicted in the following diagram is present in
Identify the statements as true (T) or false (F).
(a) Stem tendrils develop from axillary buds in gourds and grapevines.
(b) In Opuntia, the stem becomes flattened and fleshy. It contains chlorophyll and carries out photosynthesis.
(c) In Chrysanthemum, the lateral branches arise from the apex of the plant.
(d) Underground stems of grass and strawberry spread to new niches.
Match the following according to the form of stem.
|
Column – I |
Column – II |
|
a. Eichhornia |
(i) Sucker |
|
b. Pineapple |
(ii) Runner |
|
c. Mint |
(iii) Offset |
|
d. Grasses |
(iv) Stolon |
A lateral branch with short internode and each node bearing a rosette leaves and tuft of root is found in aquatic plants such as:
