Q. No.Stipe, hold fast and frond are the terms associated with
1 Gracilaria
2 Polysiphonia
3 Laminaria
4 Chara
Leaf like photosynthetic organ is associated with algal group
| 1. | Showing only oogamous reproduction |
| 2. | Having predominance of r-phycoerythrin |
| 3. | Where members may reach a height of 100 metres |
| 4. | Usually having grass-green colour |
Ovules present on loose megasporophylls, unbranched stem and dicotyledonous condition are features related to
| 1. | Cycas | 2. | Pinus |
| 3. | Cedrus | 4. | Ephedra |
The leaves of gymnosperms
| 1. | Are not adapted to withstand extremes of temperature |
| 2. | May be simple or compound |
| 3. | Are needle shaped in all members |
| 4. | Lack transfusion tissue |
In heterosporous members of the pteridophyta
| 1. | Development of embryo takes place within the female gametophyte |
| 2. | Zygote produces a multicellular and undifferentiated sporophyte |
| 3. | Gametophyte is monoecious |
| 4. | Spore germination is exosporic |
Members of red algae are mostly marine, occurring both at surface water and at great depths in oceans except for a few fresh water species. These algae usually
| 1. | Reproduce asexually by motile spores |
| 2. | Show oogamous reproduction by motile gametes |
| 3. | Lack of chlorophyll-a and fucoxanthin |
| 4. | Reproduce vegetatively by fragmentation |
Read the following statements carefully and mark the correct with respect to gymnosperms
| a. | Pollen grains are carried by air currents |
| b. | Pollen tube carries the male gametes to archegonia |
| c. | Ovules are exposed before fertilization but get covered after fertilization |
| d. | They produce same type of spores |
1. a, b & d
2. a & b
3. a & c
4. b & d
Mark the incorrect statement (with respect to gymnosperms)
| 1. | Sequoia is one of the tallest tree species |
| 2. | Dimophihc roots, stem and leaves in pinus |
| 3. | Generally tap roots are present |
| 4. | Palmately compound leaves in Cycas |
Study the following diagram carefully and select the correct statement given below for this plant
| 1. | It is a source of carrageenan |
| 2. | It shows the haplontic life cycle |
| 3. | Laminarin has stored food in it |
| 4. | (2) and (3) both |
What is a, b, c, and d in the given table for algae?
|
Class |
Pigment |
Stored food |
Flagella |
|
Chlorophyceae |
Chl. a, b |
__a__ |
2-8 equal |
|
__b__ |
Chl. a, c, Fucoxanthin |
Laminarin |
__c__ |
|
Rhodophyceae |
Chl. a, d, Phycoerythrin |
__d__ |
Absent |
| 1. | a : Starch; b : rhodophyceae; c : 2, Lateral equal; d : Floriden starch |
| 2. | a : Glycogen; b : Pheophyceae; c : 2 Lateral unequal; d : Floriden starch |
| 3. | a : Starch; b : Pheophyceae; c : 2 apical unequal; d : Floriden starch |
| 4. | a : Starch; b : Pheophyceae; c : 2 Lateral unequal; d : Floriden starch |
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