Q. No.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
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
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
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 |
| 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. |
1. Escherechia coli
2. Plasmodium falciparum
3. Amoeba
4. Penicillum
1. 17
2. 34
3. 51
4. 68
1. Eichhornia crassipes
2. Bryophyllum
3. Rhizophora
4. Amorphophallus
1. all gametes produced are genetically identical
2. four gametes are always produced from a meiocyte in all organisms
3. only one set of chromosomes gets incorporated into each gamete
4. 50 % of gametes will have odd number and 50 % of gametes will have even number of chromosomes
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