The diagram shows the presence of a pathogen amongst RBCs in the peripheral blood smear of a patient. Even though the shape is very easy to identify, the structure highlighted in the circle should enable you to identify the pathogen easily. It is:
1. | Trypanosoma | 2. | Plasmodium |
3. | Schistosoma | 4. | Clonorchis |
The ‘photobiont’ [photosynthetic component] in a Lichen can be:
I. A green alga | II. A cyanobacterium |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
Which of the following is similar in size to viruses?
1. PPLO
2. Prions
3. Viroid
4. Actinomycetes
(i) | It was given by George Bentham and Joseph Dalton Hooker |
(ii) | It was based on natural affinities among the organisms |
(iii) | It takes into account not only the external features but also internal features |
(iv) | Internal features like ultrastructure, anatomy, embryology and phytochemistry are also considered |
(v) | Evolution is also taken into account |
1. | Large number of members of deuteromycetes are decomposers of litter and help in mineral cycling |
2. | Sex organs are absent in basidiomycetes but plasmogamy is brought about by fusion of the nuclei of the gametes |
3. | The asexual spores produced by ascomycetes are conidia, produced exogenously on the special mycelium called conidiophores |
4. | In ascomycetes and basidiomycetes, an intervening dikaryon stage exists before the fusion of parental nuclei |
Assertion (A): | Plant and animal kingdoms have been constant under all different classification systems. |
Reason (R): | The understanding of what groups/organisms are included under these kingdoms have been changing over the time. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Slime molds:
1. | form plasmodium that differentiates and forms fruiting bodies bearing spores at their tips during unfavourable conditions. |
2. | form plasmodium that differentiates and forms fruiting bodies bearing spores at their tips during favourable conditions. |
3. | form plasmodium under favourable conditions and the plasmodium differentiates and forms fruiting bodies bearing spores at their tips during unfavourable conditions. |
4. | form plasmodium under unfavourable conditions and the plasmodium differentiates and forms fruiting bodies bearing spores at their tips during favourable conditions. |
1. | protects the genetic material. |
2. | is infectious. |
3. | is composed of capsomeres made up of complex polysaccharides. |
4. | is a nucleoprotein. |
Assertion (A): | Vegetative reproduction by fragmentation is common in basidiomycetes |
Reason (R): | In club fungi, sexual spores are not formed during sexual reproduction |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion (A): | Sporozoans lack locomotory structures |
Reason (R): | Sporozoans are parasites |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |