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11th Standard Botany - Vegetative Morphology Book Back Questions

Published on: 03/09/2019

Botany - Vegetative Morphology

Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 11th Standard - Biology

chapter: - Model Question paper

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Questions:

Multiple Choice Question

5 x 1 = 5

Bryophyllum and Dioscorea are example for ______.

(a)

Foliar bud, apical bud

(b)

Foliar bud, cauline bud

(c)

Cauline bud, apical bud

(d)

Cauline bud, foliar bud

Curcuma amada, Curcuma domestica, Asparagus, Maranta are example of __________

(a)

Tuberous root

(b)

Beaded root

(c)

Moniliform root

(d)

Nodulose root

Example for negatively geotropic roots __________

(a)

Ipomoea, Dahlia

(b)

Asparagus, Ruellia

(c)

Vitis, Portulaca

(d)

Avicennia, Rhizophora

When the root is thick and fleshy, but does not taken a definite shape, it said to be _________

(a)

Nodulose root

(b)

Tuberous root

(c)

Monilliform root

(d)

Fasiculated root

Roots are ______.

(a)

Descending, negatively geotrophic, positively phototropic

(b)

Descending, positively geotrophic, negatively phototrophic

(c)

Ascending, positively geotrophic, negatively phototrophic

(d)

Ascending, negatively geotrophic, positively phototrophic

Generic 2

2 x 2 = 4

How root climbers differ from stem climbers?

Why lateral roots are endogenous?

Generic 5

3 x 5 = 15

Differentiate pinnate unicostate with palmate multicostate venation

Compare sympodial branching with monopodial branching.

10.

Write the similarities and difference between
a. Radical buds and foliar buds
b. Phylloclade and cladode

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Answers Key:

Multiple Choice Question

5 x 1 = 5

(b)
Foliar bud, cauline bud

(d)
Nodulose root

(d)
Avicennia, Rhizophora

(b)
Tuberous root

(b)
Descending, positively geotrophic, negatively phototrophic

Generic 2

2 x 2 = 4

(i) Root climbers: Plants climbing with the help of adventitious roots (arising from node). Eg: Piper betel,Piper nigrum, Pothos.
(ii) Stem climbers: These climbers lack specialised structure for climbing and the stem itself coils around the Support. Eg: Ipomoea, Clitoria, Quisqualis.

Lateral roots develop as extensions of the cells of pericycle in the anatomy of the root. Therefore they are said to be endogenous in origin.

Generic 5

3 x 5 = 15

Pinnately reticulate venation (unicostate) Palmately reticulate venation (multicostate) (i) In this type of venation there is only one midrib in the centre which forms many lateral branches to form a network.
(ii) Eg: Mangifera indica (i) In this type of venation there are two or more principal veins arising from a single point & they proceed outwards or upwards. (ii) Eg: Cucurbita, bay leaf Pinnately parallel venation (unicostate) Palmately parallel venation (multicostate) (i) When there is a prominent midrib in the center,
from which arise many veins perpendicularly
and run parallel to each other.
(ii) Eg: Musa, Ginger (i) In this type several veins arise from the tip
of the petiole and they all run parallel to each other and
unite at the apex.
(ii) Eg: Fan palm, Rice

S.No	Monopodial Branching	Sympodial branching
1	Indeterminate: The terminal bud grows uninterrupted and produce several lateral branches. This type of growth is also known as monopodial branching. Example: Polyalthia, Swietenia.	Determinate: The terminal bud cease to grow after a period of growth and further growth is taken care by successive or several lateral meristem or buds. This type of growth is also known as sympodial branching. Example: Cycas.

10.

a	Radical buds	Foliar buds
Differences	Radical buds arises from the lateral roots. Eg. Sweet potato	Foliar buds develop from veins or from margins of the leaves. Eg. Begonia
Similarities	It is a type of adventitious root	It is a type of adventitious root
b	Phylloclade	Cladode
Differences	Presence of series of nodes and internodes. Eg: Casuarina	Presence of one or two internodes only. Eg: Asparagus
Similarities	Phylloclade is a stem modification	Cladode is a stem modification