Q. No.
Examine the figure (A-D) given below and select the right option out of 1-4, in which all the four structures A, B, C, and D are identified correctly:
Options
| A | B | C | D | |
| 1. | Runner | Archegoniophore | Synergid | Antheridium |
| 2. | Offset | Antheridiophore | Antipodals | Oogonium |
| 3. | Sucker | Seta | Megaspore mother cell |
Gamma cup |
| 4. | Rhizome | Sporangiophore | Polar cell | Globule |
Encystation in unfavourable conditions followed by multiple fission and sporulation when the favourable conditions return is seen in:
1. Sponges
2. Penicillium
3. Amoeba
4. Yeast
Which of the following plants is monoecious?
1. Marchantia polymorpha
2. Cycas circinalis
3. Carica papaya
4. Chara
There are various types of reproduction. The type of reproduction adopted by an organism depends on:
1.The habitat and morphology of the organism
2.Morphology of the organism
3.Morphology and physiology of the organism
4.The organism’s habitat, physiology and genetic makeup
विभिन्न प्रकार के प्रजनन हैं। किसी जीव द्वारा अपनाए गए प्रजनन का प्रकार इस पर निर्भर करता है:
A.जीव का आवास और आकारिकी
B.जीव की आकारिकी
C.जीव की आकारिकी और शारीरिकी
D.जीव का आवास, शारीरिकी और आनुवंशिक संरचना
Read the following statements A & B and choose the correct option :
Statement A: Asexual reproduction is a fast process.
Statement B: Progeny of sexually reproducing organisms shows variations due to crossing over.
1. Both statements A and B are correct
2. Both statements A and B are incorrect
3. Only statement A is correct
4. Only statement B is correct
A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs just after the formation of zygote. The adult filament of the alga has:-
1. Haploid vegetative cells and diploid gametangia
2. Diploid vegetative cells and diploid gametangia
3. Diploid vegetative cells and haploid gametangia
4. Haploid vegetative cells and haploid gametangia
A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs just after the formation of zygote. The adult filament of the alga has
(1) haploid vegetative cells and diploid gametangia
(2) diploid vegetative cells and diploid gametangia
(3) diploid vegetative cells and haploid gametangia
(4) haploid vegetative cells and haploid gametangia
| 1. | it reproduces asexually at a phenomenal rate making it an invasive species in water bodies. |
| 2. | it is very damaging competitor to the jute crop in West Bengal. |
| 3. | it produces secondary metabolites such as cardiac glycosides causing death of cattle feeding on it. |
| 4. | it flowers once in a decade and when it does it produces a lot of toxins in aquatic bodies. |
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