Multiple Choice QuestionsElectron microscope is based on the principle of
electromagnetic theory
resolution of glass lenses
magnification of glass lenses
refraction of light
Lichens are described as indicator of
air pollution
water pollution
soil pollution
agriculture productivity
A.
air pollution
Lichens are composite organisms consisting of a symbiotic association of a fungus with a photosynthetic partner, usually either a green alga or cyanobacterium. Lichens are widespread and may be long-lived. However, many species of lichens are vulnerable to environmental disturbance. It may be useful to scientists in assessing the effects of air pollution, ozone depletion and metal contamination.
Which one of the following viruses contains is a DNA and RNA?
Cyanophage
Herpes virus
Leuko virus
Polio virus
Identify the correct sequence of events in the viral replication process.
I. Eclipse
II. Maturation
III. Adsorption
IV. Assembly
V. Penetration
VI. Lysis
I, II, III, IV, V, VI
II, I, III, IV, V, VI
III, V, I, II, IV, VI
III, V, VI, IV, II, I
Match the items in column I with those in Column II and choose the correct answer.
| Column I | Column II |
| A. Blue- green algae as biofertilizer | 1. Ectomycorrhiza |
| B. Fungi as biofertilizer | 2. Thiobacillus sp. |
| C. Free living nitrogen fixing bacteria | 3. Anabaena sp. |
| D. Phosphate solubilizing bacteria |
4. Clostridium sp. 5. Azospirillium sp. |
A- 3; B- 1; C- 5; D- 2
A- 5; B- 1; C- 2; D- 4
A- 5; B- 4; C- 1; D- 2
A- 4; B- 2; C- 4; D- 2
lsogamous condition with non-flagellated gametes is found in
Chlamydomonas
Spirogyra
Volvox
Fucus
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