Q. No.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.
Consider the given statements regarding patterns of life cycle in living organisms:
I. In haplontic life cycles, zygotes are the only diploid cells; mitosis occurs only in the diploid phase.
II. In diplontic life cycles, gametes are usually the only haploid cells, and mitosis usually occurs only in the haploid phase.
III. In haplo-diplontic life cycle, alternation of generations is marked and mitosis occurs in both haploid and diploid phases.
| 1. Only III is correct | 2. Both I and II are correct |
| 3. All are correct | 4. All are incorrect |
The given diagram shows:
1. Male thallus of Marchantia
2. Female thallus of Marchantia
3. Sphagnum sporophyte
4. Sphagnum gametophyte
In the given diagram of Funaria, what are A, B, C and D respectively?
1. Sporophyte, Gametophyte, Female branch, Male branch
2. Gametophyte, Sporophyte, Female branch, Male branch
3. Sporophyte, Gametophyte, Male branch, Female branch
4. Gametophyte, Sporophyte, Male branch, Female branch
Match each item in Column I with one in Column II and select the correct answer from the codes given:
|
Column I |
Column II |
|
A. Floridean starch |
a. It is created by photosynthesis and is made up of β(1→3)-glucan with β(1→6)-branches |
|
B. Laminarin |
b. An α-linked glucose polymer with a degree of branching intermediate between amylopectin and glycogen |
|
C. Mannitol |
c. A sugar alcohol, an isomer of sorbitol |
Codes
| A | B | C | |
| 1. | a | b | c |
| 2. | a | c | b |
| 3. | b | a | c |
| 4. | c | b | a |
The given pattern of life cycle will be seen in:
| 1. Spirogyra | 2. Fucus |
| 3. Chlamydomanas | 4. Polysiphonia |
The given pattern of life cycle will be seen in:
| 1. Spirogyra | 2. Fucus |
| 3. Ectocarpus | 4. Polysiphonia |
The given pattern of life cycle will be seen in:
| 1. Spirogyra | 2. Fucus |
| 3. Ectocarpus | 4. Polysiphonia |
The term ‘seaweeds’ is used to describe several macroscopic, multicellular marine algal species belonging to:
I. Chlorophyceae
II. Phaeophyceae
III. Rhodophyceae
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
Match each item in column I with one in Column II and select the correct answer from the codes given below:
|
Green alga |
Feature |
|
A. Chlamydomanas |
a. Non motile colony |
|
B. Volvox |
b. Coenobium with two kinds of cells |
|
C. Hydrodictyon |
c. Palmella stage |
|
D. Spirogyra |
d. Spiral chloroplasts |
Codes:
| A | B | C | D | |
| 1. | a | d | b | c |
| 2. | a | b | c | d |
| 3. | c | b | a | d |
| 4. | c | d | a | b |
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