PLANT KINGDOM
Previous Year Questions (2015 - 2020)
2020 March
1. Match the items of column A with B:
| Column A | Column B |
|---|---|
| a) Double fertilisation | i. Bryophyte |
| b) Heterospory | ii. Algae |
| c) Protonema | iii. Gymnosperm |
| d) Naked seeds | iv. Pteridophyte |
| v. Angiosperm |
Correct Match:
a) Double fertilisation — v. Angiosperm
b) Heterospory — iv. Pteridophyte (e.g., Selaginella)
c) Protonema — i. Bryophyte
d) Naked seeds — iii. Gymnosperm
a) Double fertilisation — v. Angiosperm
b) Heterospory — iv. Pteridophyte (e.g., Selaginella)
c) Protonema — i. Bryophyte
d) Naked seeds — iii. Gymnosperm
2019 July Improvement
1. Match the columns A and B:
| Column A | Column B |
|---|---|
| i. Prothallus | a) Mosses |
| ii. Sporophylls | b) Plant body of algae |
| iii. Coralloid roots | c) Gametophyte of Pteridophytes |
| iv. Protonema | d) Sporangia bearing leaves |
| e) Nitrogen fixation |
Correct Match:
i. Prothallus — c) Gametophyte of Pteridophytes
ii. Sporophylls — d) Sporangia bearing leaves
iii. Coralloid roots — e) Nitrogen fixation (in Cycas)
iv. Protonema — a) Mosses
i. Prothallus — c) Gametophyte of Pteridophytes
ii. Sporophylls — d) Sporangia bearing leaves
iii. Coralloid roots — e) Nitrogen fixation (in Cycas)
iv. Protonema — 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.
Identify the phase marked as A. Write any two peculiarities of this stage.
Answer:
• A = Sporophyte
• Peculiarities:
1. It is a diploid (2n) structure.
2. It produces haploid (n) spores.
• A = Sporophyte
• Peculiarities:
1. It is a diploid (2n) structure.
2. It 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 |
Correct Match:
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
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 (in Gemma cups)
• Features: Gemmae are green, multicellular, asexual/vegetative buds which develop in small receptacles called gemma cups.
• Plant: Marchantia
• Asexual bud: Gemma (in Gemma cups)
• Features: Gemmae are green, multicellular, asexual/vegetative buds which develop in small receptacles called gemma cups.
2017 July Improvement
1. Distinguish between protonema and prothallus. (2)
Answer:
• Protonema: The first stage of mosses which develops directly from a spore. It is creeping, green, and branched.
• Prothallus: The thalloid, multicellular, free-living gametophyte formed by the germination of spores in Pteridophytes.
• Protonema: The first stage of mosses which develops directly from a spore. It is creeping, green, and branched.
• Prothallus: The thalloid, multicellular, free-living gametophyte formed by the germination of spores in Pteridophytes.
2017 March
1. Algae are useful to man in a variety of ways. Suggest any four uses of algae. (2)
Answer:
1. Many marine algae (e.g., Sargassum, Porphyra) are used as food.
2. Gelidium & Gracilaria produce Agar (used in labs and ice creams).
3. Brown & Red algae produce Hydrocolloids (water holding substances like Algin and Carrageen).
4. Chlorella & Spirulina are protein-rich food supplements for space travelers.
1. Many marine algae (e.g., Sargassum, Porphyra) are used as food.
2. Gelidium & Gracilaria produce Agar (used in labs and ice creams).
3. Brown & Red algae produce Hydrocolloids (water holding substances like Algin and Carrageen).
4. Chlorella & Spirulina are protein-rich food supplements for space travelers.
2016 March
1. Write any two distinguishing features of the algal class Rhodophyceae. (2)
2. Distinguish between mycorrhiza and coralloid roots. (2)
2. Distinguish between mycorrhiza and coralloid roots. (2)
Answer 1 (Rhodophyceae):
- They have a dominant red pigment, r-phycoerythrin.
- The food is stored as floridean starch.
Answer 2:
- Mycorrhiza: Fungal association with roots of Gymnosperms like Pinus.
- Coralloid roots: Specialized roots in Cycas associated with N2-fixing cyanobacteria.
- They have a dominant red pigment, r-phycoerythrin.
- The food is stored as floridean starch.
Answer 2:
- Mycorrhiza: Fungal association with roots of Gymnosperms like Pinus.
- Coralloid roots: Specialized roots in Cycas 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. (2)
Answer:
• Plant Group: Bryophytes.
• Characters:
1. They lack true roots, stem, or leaves.
2. The main plant body is haploid and produces gametes.
3. Male sex organ is antheridium and female sex organ is archegonium.
• Plant Group: Bryophytes.
• Characters:
1. They lack true roots, stem, or leaves.
2. The main plant body is haploid and produces gametes.
3. 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)
| Class | Major Pigments | Stored Food |
|---|---|---|
| Chlorophyceae | Chlorophyll-a, b | ..... a ..... |
| Phaeophyceae | Chlorophyll-a, c and .... b .... | Laminarin, Mannitol |
| ..... c ..... | Chlorophyll-a, d & Phycoerythrin | ..... d ..... |
Answer:
a) Starch
b) Fucoxanthin
c) Rhodophyceae
d) Floridean starch
a) Starch
b) Fucoxanthin
c) Rhodophyceae
d) Floridean starch