Q. No.The given diagram shows:
1. Male thallus of Marchantia
2. Female thallus of Marchantia
3. Sphagnum sporophyte
4. Sphagnum gametophyte
1. Male thallus of Marchantia
2. Female thallus of Marchantia
3. Sphagnum sporophyte
4. Sphagnum gametophyte
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The given diagram shows:
| 1. | Salvinia with A being antheridial branch and B being archegonial branch |
| 2. | Salvinia with A being archegonial branch and B being antheridial branch |
| 3. | Sphagnum with A being antheridial branch and B being archegonial branch |
| 4. | Sphagnum with A being archegonial branch and B being antheridial branch |
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Consider the given two statements:
I. The term ‘embryophytes’ is an appropriate synonym for plants.
II. The occurrence of a multicellular, matrotrophic embryo in plants from bryophytes through angiosperms.
1. Both I and II are correct and II explains I
2. Both I and II are incorrect but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
The bryophyte that plays a very important role in global carbon cycle is:
1. Funaria
2. Marchantia
3. Anthoceros
4. Sphagnum
Consider the two trends in evolution of plants:
I. A reduction of vascular tissues occurs from gymnosperms and woody dicots to herbaceous dicots to monocots
II. The gametophytes of vascular plants have become smaller and simpler
1. Both I and II are correct
2. Only I is correct
3. Only II is correct
4. Both I and II are incorrect
Match each item in Column I with one in Column II and select the correct answer from the codes given:
|
A. |
Algin |
a. |
Chondrus |
|
B. |
Agar |
b. |
Macrocystis |
|
C. |
Carregeenan |
c. |
Gelidium |
Codes
A B C
1. a b c
2. b c a
3. b a c
4. a c b
The seed of a gymnosperm is a complex structure with three generations locked up in it. Identify the correct match:
I. Female gametophyte: Old generation
II. Seed coat: Present generation
III. Embryo: Future generation
1. Only I
2. Only III
3. Only I and II
4. Only II and III
Which of the following is not true for the green alga Spirogyra?
1. Unbranched, filamentous and commonly found in stagnant fresh water bodies.
2. The filament is composed of large number of long, cylindrical cells placed one above the other in a single row.
3. The cells are characterised by long spiral ribbon-shaped chloroplasts with several pyrenoids.
4. There are multiple small vacuoles in each cell.
Identify the incorrect statement regarding Marchantia?
1. Thallus is dorsiventrally flat.
2. Thallus is dichotomously lobed, with an apical notch in each lobe.
3. There is a dark median furrow called mid-rib on the dorsal side that extends into each lobe.
4. Small cup-like structures called gemma cups are borne on the ventral surface of the thallus.
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Identify the correct statement regarding Marchantia:
| 1. | Multicellular rhizoids help in anchorage and absorption of water through their capillary action. |
| 2. | Reproductive organs are borne on antheridiophores and archegoniophores that arise from the apical notches of male and female thalli respectively. |
| 3. | The antheridiophore has an umbrella shaped structure which bears antheridia. |
| 4. | The archegoniophores have flattened, more or less convex head or receptacle. |
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