Q. No.Sexual reproduction of Spirogyra is an advanced feature as it shows
| 1. | Different sizes of motile sex organs |
| 2. | Same size of motile sex organs |
| 3. | Morphologically different sex organs |
| 4. | Physiologically different sex organs |
Wood of Pinus is
| 1. | Manoxylic and homoxylous |
| 2. | Manoxylic and heteroxylous |
| 3. | Pycnoxylic and homoxylous |
| 4. | Pycnoxylic and heteroxylous |
Chl a, Chl d and phycoerythrin occur in
| 1. | Chlorophyceae | 2. | Bacillariophyceae |
| 3. | Cyanophyceae | 4. | Rhodophyceae |
Which one of the following statements is wrong?
| 1. | Laminaria and Sargassum are used as food. |
| 2. | Algae increase the level of dissolved oxygen in the immediate environment. |
| 3. | Algin is obtained from red algae, and carrageenan from brown algae. |
| 4. | Agar-agar is obtained from Gelidium and Gracilaria. |
Which of the following pairs is of unicellular algae?
| 1. | Gelidium and Gracilaria |
| 2. | Anabaena and Volvox |
| 3. | Chlorella and Spirulina |
| 4. | Laminaria and Sargassum |
Examine the figure given below and select the right option giving all the four parts (a, b, c and d) correctly identified.
| (a) | (b) | (c) | (d) | |
| 1. | Archegoniophore | Female thallus | Gemma cup | Rhizoids |
| 2. | Archegoniophore | Female thallus | Bud | Foot |
| 3. | Seta | Sporophyte | Protonema | Rhizoids |
| 4. | Antheridiophore | Male thallus | Globule | Roots |
In a moss, the sporophyte
1. Manufactures food for itself, as well as for the gametophyte
2. Arises from a spore produced from gametophyte
3. Is partially parasitic on the gametophyte
4. Produces gametes that give rise to the gametophyte
Read the following statements (A-E) and answer the question which follows them.
| (A) | In liverworts, mosses, and ferns gametophytes are free-living |
| (B) | Gymnosperms and some ferns are heterosporous |
| (C) | Sexual reproduction in Fucus, Volvox and Albugo is oogamous |
| (D) | The sporophyte in liverworts is more elaborate than that in mosses |
| (E) | Both, Pinus and Marchantia, are dioecious |
How many of the above statements are correct?
| 1. Two | 2. Three |
| 3. Four | 4. One |
Conifers are adapted to tolerate extreme environmental conditions because of
| 1. | presence of vessels | 2. | broad hardy leaves |
| 3. | superficial stomata | 4. | thick cuticle |
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