Botany MCQs Quiz Multiple Choice Questions & Answers

1. Green house effect is related to

1. Development of terrace gardens.
2. Increased growth of green algae
3. Global warming
4. Cultivation of vegetables in house

2. Green manure plants used by farmers mainly belong to

1. Poaceae
2. Compositae
3. Leguminosae
4. Solanaceae

3. Horticulture is the study that includes

1. Some bush crops and apples
2. Fruits, vegetables and flowers
3. All food crops
4. Vegetable gardens and lawns near hotels only

4. In cold places frost damage can be reduced in horticultural crops using these methods except

1. Appropriate fungicide application
2. Overhead sprinklers at night
3. Green houses and shade nets
4. Wind breaks placement

5. In cutting method of vegetative propagation, cuttings are mainly taken from

1. Buds of parent plant
2. Leaves of parent plant
3. Roots or stems of parent plant
4. Shoots of parent plant

6. In hybridization this is not part of the technique used

1. Use of two plants to bridge the stems together
2. Transfer pollen
3. Collect pollen
4. Emasculate

7. Increasing high skin cancer and high mutation rate are

1. CO2 Pollution.
2. O3 depletion
3. Acid rain
4. CO pollution

8. Itai-Itai disease is due to the toxicity of

1. Tin.
2. Lead
3. Cadmium
4. Strontium

9. Layering can be done on plants such as

1. Oleander
2. bulbs
3. Lime
4. Sugar cane

10. Layering can be done on plants such as

1. Oleander
2. Bulbs
3. bougainvillea
4. Sugar cane

11. Lichens indicate pollution by

1. CO.
2. O3
3. SO2
4. NO2

12. Linnaeus is credited with introducing

1. Binomial nomenclature
2. The concept of inheritance
3. Law of limiting factor
4. Theory of heredity

13. Main function of biofertilizer is

1. To increase photosynthesis process
2. To increase chemical process
3. To increase physiological process
4. To increase biological process

14. Main function of biofertilizer is

1. To increase photosynthesis process
2. To increase chemical process
3. To increase physiological process
4. To increase biological process

15. Major aerosol pollutant in Jet Plane emission is

1. CFC.
2. SO2
3. CO
4. CH4

16. Minamata disease is due to pollutant

1. Sulphur dioxide
2. Lead
3. Mercury
4. Hydrogen Sulphide

17. Most abundant water pollutant is

1. Ammonia.
2. Detergents
3. Pesticides
4. Industrial wastes

18. Mycorrhizae is associated with the following

1. Soil erosion
2. Formation of root nodules
3. Hyphae penetrating the soil
4. Found mostly in lower plants

19. Noise Pollution is measured in

1. Decibels.
2. Hertz
3. Fathoms
4. Manometers

20. Onion and garlic are examples of

1. bulb
2. Rhizome
3. corm
4. stem tuber

21. Ozone day is observed on

1. 30th January.
2. 25th December
3. 16th September
4. 21st April

22. Ozone hole causes

1. All the above.
2. Global warming
3. Reduction in the rate of photosynthesis
4. More UV rays come to earth

23. Ozone hole is caused by

1. Methane.
2. Acetylene
3. Ethylene
4. Chlorofluorocarbons

24. Ozone layer is found in

1. Lithosphere.
2. Thermosphere
3. Stratosphere
4. Mesosphere

25. Pesticide responsible for Ozone depletion is

1. None of the above.
2. BHC
3. DDT
4. Melathion

26. Pollutants released from paddy field is

1. CH4.
2. CO2
3. CO
4. H2O2

27. Pudding is done to

1. All of the above
2. Reduce percolation of water
3. Pulverise and levelling soil
4. Kill weeds

28. Role of CFC present in atmosphere is to

1. Enhance chlorophyll formation.
2. Reduction in ozone
3. Ozone formation
4. Formation of leg haemoglobin

29. Root suckers are

1. Roots of neighboring plants that share water with the another plant
2. Insects that suck nutrients from the roots of plants
3. Shoots that arise from roots to form new plant
4. New plant parts that arise from the branches of fruit trees

30. Rootex contains

1. Ethylene
2. Auxins
3. ABA
4. Kinetin

31. Roses can grow successfully if stock and scion are

1. Of similar class
2. Of related species
3. Of different species
4. Of different groups

32. Seed treatment is done to control

1. None of these
2. Soil-borne disease
3. Air-borne disease
4. Seed-borne disease

33. Seed treatment with Vitavex is the main controlling method of

1. All of these
2. Loose smut
3. Rust
4. Downy mildew

34. SO2 and NO2 Produce pollution by increasing

1. Buffer action.
2. Alkalinity
3. Acidity
4. Neutrality

35. SO2 pollution causes

1. Destruction of chlorophyll.
2. Plasmolysis
3. Destruction of cell wall
4. Destruction of Golgi bodies

36. Sound becomes hazardous noise pollution at level

1. Above 120 dB.
2. Above 30 dB
3. Above 80 dB
4. Above 100 dB

37. Spot the odd one

1. Bonsai
2. Borders
3. Hedges
4. Edges

38. Spraying of DDT produces pollution of

1. Air, Water and Soil.
2. Air
3. Air and Water
4. Air and Soil

39. The desired varieties of economically useful crops are raised by

1. hybridisation
2. Vernalization
3. Mutation
4. Natural selection

40. The following is not a plant growth regulator

1. Ethylene
2. Acetic acid
3. Auxins
4. Gibberellins

41. The instrument, which is used for sowing of seed with fertilizer together at a time, is

1. Ferti-cum Seed drill
2. Seed drill
3. Dibbler
4. Seed sowing behind plough

42. The main atmospheric layer near the surface of earth is

1. Stratosphere
2. Troposphere
3. Mesosphere
4. Ionosphere

43. The main function of NABARD is

1. Development of agriculture
2. Farmers loaning
3. Agricultural research
4. Refinancing to agricultural financing institutions

44. The newspaper contains one of the following toxic material

1. Hg.
2. Mg
3. Cd
4. Pb

45. The pH in soils can be raised by adding:

1. nitrogen
2. Sand
3. lime
4. sulphur

46. The process by which nutrient chemicals or contaminants are dissolved and carried away by water, or are moved into a lower layer of soil

1. Leaching
2. Mulching
3. Desertification
4. Incineration

47. The word Agriculture is derived from

1. French
2. Greek
3. Latin
4. Arabic

48. The worst enemy of ozone is

1. CO.
2. Liquid NH3
3. SO2
4. CH4

49. Thermal pollution is more common near

1. Temperate regions.
2. Hot water springs
3. Coal based power plants
4. Tropical regions

50. Tissue culture is a good technique to

1. Improve yield of crops
2. Cross two varieties
3. Rapidly increase the size of a trees by strengthening the stem
4. Eliminate virus