Tuesday, March 13, 2012

PLANT ECOLOGY-ASSIGNMENT

1 Long and linear leaves are seen in




Ans:Potamogeton
2 Eichhornia has
i) Spongy stem
ii) Spongy petiole
iii) Balancing roots





Ans:i, ii and iii are correct
3 Leaves of these hydrophytes are relatively larger




Ans:Rooted hydrophytes with floating leaves
4 Assertion : Respirating roots of Jussiaea are adventitious.
Reason : Hydrophytes usually have adventitious roots.





Ans:Both A and R are true and R is the correct explanation of A
5 Assimilatory epidermis is present in




Ans:Vallisnaria
6 Relatively wider cortex is seen in the roots of




Ans:Asparagus
7 Sclerenchymatous hypodermis is seen in the leaves of




Ans:Pinus
8 Identify the plant whose leaf is extended throughout the depth of waterbody




Ans:Nelumbo
9 Assertion : Sagittara has poorly developed xylem.
Reason : Hydrophytes grow in water rich conditions.





Ans:Both A and R are true and R is the correct explanation of A
10 Assertion : Nymphaea is a hydrophyte.
Reason : It has astrosclereids.





Ans:Both A and R are true but R is not the correct explanation of A
11 Study the following

Identify the two correct items





Ans:i and ii
12 Sub-aerial modified stems have no contact with the soil in




Ans:Eichhornia
13 Hydrochory is shown by




Ans:Nymphaea
14 Sagittaria shows
i) Heterophylly
ii) Stoloniferous stem
iii) Hydrophily





Ans:i and ii
15 Both aerial and underwater roots are seen in




Ans:Jussiaea
16 Match the following and identify the correct match
A. Plant having contact with only water    I) Ranunculus
B. Plant always having contact with
 both water and soil only            II) Ceratophyllum
C. Plant always having contact with
 air and water                             III) Cyperus
D. Plant always having contact with
 air water and soil                     IV) Salvinia
                                     V) Potamogeton 





Ans:A-II, B-V, C-IV, D-I
17 The following plant has relatively more developed xylem




Ans:Typha
18 The hydrophyte with developed root caps is




Ans:Cyperus
19 All leaves of the plant are dissected and root like in




Ans:Ceratophyllum
20 Odum defined ecology as




Ans:Study of ecosystems
21 This plant has contact with neither atmosphere nor soil




Ans:Utricularia
22 Assertion : Pistia has root pocket.
Reason : All hydrophytes lack root caps.





Ans:A is true but R is false
23 Choose the correct statement




Ans:All hydrophytes have aerenchyma
24 Study the following

Identify the two correct items





Ans:iii and iv
25 This hydrophyte can effectively survive for some time in dry period




Ans:Cyperus
26 Match the following
A. Hydrilla I) Bulbs
B. Nymphaea II) Rhizome
C. Aloe        III) Bulbils
D. Agave IV) Fragmentation
                   V) Suckers





Ans:A - IV, B - II, C - V, D - III
27 Stem doesn’t store water in




Ans:Casuarina
28 Arrange the following hydrophytic plants in a sequence of plants ‘having contact with soil and water’, ‘with only water’, ‘with water and atmosphere’ and ‘with water’ and ‘soil and atmosphere’
i) Ceratophyllum
ii) Sagittaria
iii) Eichhornia
iv) Potamogeton





Ans:iv, i, iii, ii
29 Assertion : Tribulus usually grows in Arid zones.
Reason : Xerophytes can grow only in water scarcity conditions.





Ans:A is true but R is false
30 Assertion : Well developed root cap is seen in Cyperus.
Reason : It is an amphibious plant.





Ans:Both A and R are true and R is the correct explanation of A
31 Leaves of Potamogeton are




Ans:Linear
32 Match the following
A. Rootless hydrophyte                      I) Cyperus
B. Hydrophyte with horizontally
 growing stem                              II) Nelumbo
C. Epistomatous plant                     III) Ranunculus
D. Hydrophyte surviving in dry periods      IV) Wolffia
                                             V) Azolla 





Ans:A - IV, B - V, C - II, D - I
33 Assertion : Eichhornia root shows polyarch and exarch condition.
Reason : It is a hydrophyte.





Ans:Both A and R are true but R is not the correct explanation of A
34 Succulent xerophyte with epidermal cells storing water is




Ans:Peperomia
35 Leaves are not transluscent in




Ans:Pistia
36 Study the following

Identify the two correct items





Ans:i and iv
37 Hydrophyte with some aerial and with some underwater leaves




Ans:Salvinia
38 Assertion : Tribulus shows mesophytic characters.
Reason : It never faces water deficient conditions.





Ans:Both A and R are true and R is the correct explanation of A
39 Match the following and identify the correct match
A. Leaves with multilayered 
sclerenchymatous hypodermis    I)Tribulus
B. Leaves with multiple epidermis  II)Aloe
C. Stems with multilayered 
sclerenchymatous hypodermis       III)Nerium
D. Leaves with mucilaginous mesophyll IV)Pinus
                                         V)Casuarina





Ans:A-IV, B-III, C-V, D-II

No comments:

ASTHRA JUNIOR COLLEGE , VIJAYAWADA