Wednesday, October 7, 2020

Plant Kingdom | Previous year Questions | Class 11

PLANT KINGDOM 

2010 March 

1. Match the following: (2)
Prothallus      Mosses
Synergid        Strobilus
Protonema     Gametophyte
Sporophyll     Egg apparatus

2010 September 

1. Plants with haplontic life cycle include dominant gametophyte while in diplontic life cycle sporophyte is the dominant phase. Name the type of life cycle that is intermediate between the two. (1)

2. The process of fertilization in angiosperms is known as double fertilization. Comment on it. (1)

2011 March 

1. In Bryophytes, the dominant phase in the life cycle is the gametophytic plant. However in Pteridophytes, the main plant body is a sporophyte. How can we easily differentiate between the sporophytes in Bryophytes and Pteridophytes? (2)

2011 October (Improvement) 

1. a) Write the name of the stored food of the algal classes in the table given below (1)

Class

Stored food

Phaeophyceae

 

Rhodophyceae

 


b) Liver worts reproduce asexually by fragmentation and by a specialized structure. Name the specialized structure for asexual reproduction. (½)

c) Selaginella produces macro and micro spores in the same strobilus is called ---------- (½)

2012 March 

1. Most Pteridophytes are homosporous but there are exceptions.

a. Identify two heterosporous genera. (1)
b. ‘Heterospory is a precursor to seed habit’. Point out any one common character found in heterospory and seed habit. (1)

OR 

2. Even though algae are primary producers on aquatic ecosystems, man is benefited by algae in a variety of ways. Write any four points in favour of this statement. (2)

2012 September (Improvement) 

1. The following is a list of characteristic features of angiosperms and gymnosperms. Choose those characters that belong to gymnosperms. (2)

a. Tracheids alone form the conducting elements in xylem.
b. Production of fruits.
c. Naked seeds
d. Cones are seen
e. Flowers absent
f. Xylem mainly contains vessels
g. Double fertilization present

2013 March 

1. ‘Double fertilization is an event unique to angiosperms’.

a. Mention the two fusions in this event. (1)
b. Name the products obtained as a result of these fusions. (1)

2013 September-October (Improvement) 

1. Give reasons for the following:

a. Bryophytes are called amphibians of plant kingdom.
b. Fertilization in angiosperm is known as double fertilization. (1+1=2)

2014 March 

1. Unlike a majority of the Pteridophytes, genera like Selaginella and Salvinia show a unique feature in spore formation.

a. What is this feature? (1)
b. Briefly comment on its significance. (1)

2014 August (Improvement) 

1. Match the following (2)

A

B

a)    Floridian starch

Gymnosperm

b)    Double fertilization

Red algae

c)     Coralloid roots

Fern

d)    Prothallus

Angiosperms


2015 March 

1. The class of fungi known as imperfect fungi is (1)

a) Ascomycetes 
b) Phycomycetes 
c) Deuteromycetes 
d) Basidiomycetes

2. Complete the given table of algal divisions and their main characteristics by filling 'a', 'b', 'c' ‘and ‘d’. (2)

Chlorophyceae

Chlorophyll-a, b

……..a……..

Phaeophyceae

Chlorophyll-a, c and ….. b……..

Laminarin mannitol

……. c …….

Chlorophyll-a, d & Phycoerythrin

……. d …….


2015 September (Improvement) 

1. ‘Amphibians of plant kingdom’ is used to denote a specific group in plant kingdom.

Name the plant group and list any three vegetative or reproductive characters of that plant group. (2)

2016 March 

1. Write any two distinguishing features of the algal class Rhodophyceae. (2)

OR 

Distinguish between mycorrhiza and coralloid roots. (2)

2017 March 

1. Algae are useful to man in a variety of ways. Suggest any four uses of algae. (2)

2017 July (Improvement) 

1. Distinguish between protonema and prothallus. (2)

2018 March 

1. The given figure shows a plant belonging to liverworts. Identify the plant. Name the asexual buds seen on it and write their features.


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