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. |
The members of Kingdom Monera and Kingdom Protista in Whittaker’s five kingdom classification resemble each other in:
1. | Cell type | 2. | Body organization |
3. | Nature of cell wall | 4. | Nuclear membrane |
What is common to Anabaena, Nostoc, Nitrosomonas and Nitrobacter?
I. | All are photosynthetic autotrophs. |
II. | All can directly fix atmospheric nitrogen. |
1. | Only I | 2. | Only II |
3. | Both I and II | 4. | Neither I nor II |
A: | Methanogens are archaebacteria. |
B: | Blue green algae are unicellular algae. |
C: | Mycoplasma are true bacteria. |
I: | Bacteria reproduce sexually |
II: | Transformation of a bacterial cell is sexual reproduction |
Assertion(A): | Archaebacteria can survive in extreme harsh habitats |
Reason(R): | Archaebacterial cell wall has peptidoglycan that helps them survive in harsh habitats |
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 |
(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 |
How many organisms in the list given below are autotrophs?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia |
1. Five
2. Six
3. Three
4. Four
(a) | Are chief producers in the ocean |
(b) | Have silica impregnated cell membrane |
(c) | Are called flagellated golden protists |
(d) | Lack chlorophyll a |