PLANT KINGDOM
2020 MARCH
1. Match
the items of column A with B.
|
(A) |
(B) |
|
a) Double
fertilisation |
i. Bryophyte |
|
b) Heterospory |
ii.
Algae |
|
c) Protonema |
iii. Gymnosperm |
|
d) Naked
seeds |
iv. Pteridophyte |
|
|
v. Angiosperm |
✔️Answer:
|
(A) |
(B) |
|
a) Double
fertilisation |
v. Angiosperm
|
|
b) Heterospory |
iv. Pteridophyte/
Gymnosperm/ Angiosperm |
|
c) Protonema |
i. Bryophyte |
|
d) Naked seeds |
iii. Gymnosperm
|
2019 JULY IMPROVEMENT
1. Match
the columns A and B.
|
A |
B |
|
i. Prothallus
ii. Sporophylls
iii. Coralloid
roots
iv. Protonema
|
a) Mosses b) Plant
body of algae c) Gametophyte
of Pteridophytes d) Sporangia
bearing leaves e) Nitrogen
fixation |
✔️Answer:
A | B |
i. Prothallus ii. Sporophylls iii. Coralloid roots iv. Protonema | c) d) Sporangia bearing leaves e) a) Mosses |
2019 MARCH
1. Observe
the figure given below. It shows two phases in the life cycle of a plant.
Identify the phase marked as
A. Write any two peculiarities of this stage.
✔️Answer:
A= Sporophyte.
Peculiarities: Diploid (2n) structure. Produces haploid (n)
spores.
2018 JULY IMPROVEMENT
1. Match
the items of column A with column B.
|
Column
A |
Column
B |
|
a. Prothallus |
i. Asexual
buds in liverwort |
|
b. Protonema |
ii.
Sporophyte of angiosperms |
|
c. Antheridium |
iii. Thalloid gametophyte of pteridophyte |
|
d. Gemmae |
iv.
Male sex organs in bryophytes |
|
|
v. Gametophytic
stage of mosses |
✔️Answer:
|
Column A |
Column B |
|
a. Prothallus |
iii. Thalloid gametophyte of
pteridophyte |
|
b.
Protonema |
v. Gametophytic stage of mosses |
|
c. Antheridium |
iv. Male sex organs in bryophytes |
|
d.
Gemmae |
i. Asexual buds in liverwort |
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.
✔️Answer:
Plant: Marchantia.
Asexual bud: Gemma
Features: Gemma are green,
multicellular, asexual/ vegetative buds which develop in small receptacles.
2017 JULY (IMPROVEMENT)
1. Distinguish between protonema and prothallus. (2)
✔️Answer:
Protonema: The
first stage of mosses which develops directly from a spore.
Prothallus: The thalloid multicellular free-living gametophytes
formed by the germination of the spores in pteridophytes.
2017 MARCH
1. Algae are useful to man in a variety of ways. Suggest any four uses of
algae. (2)
✔️Answer:
- Many marine algae such as Sargassum
are used as food.
- Gelidium & Gracilaria produce
Agar.
- Some marine brown & red algae
produce hydrocolloids (water holding substances).
- Chlorella & Spirulina are
used as food supplements by space travelers.
2016 MARCH
1. Write any two distinguishing features of the algal class Rhodophyceae. (2)
✔️Answer:
- They have a red pigment, r-phycoerythrin.
- The food is stored as floridean starch.
2. Distinguish between mycorrhiza and coralloid roots. (2)
✔️Answer:
- Mycorrhiza: It is the fungal association with roots of some gymnosperms such as Pinus.
- Coralloid roots: Small specialized roots in plants like Cycas that are associated with N2- fixing cyanobacteria.
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)
✔️Answer:
Plant group: Bryophytes.Characters:- They lack true roots, stem or leaves.- The main plant body is haploid. It produces gametes.- The male sex organ is antheridium and female sex organ is archegonium.
2015 MARCH
1. 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
……. |
✔️Answer:
a) Starchb) Fucoxanthinc) Rhodophyceaed) Floridean starch.