Biology Gk Solved objective Questions

Biology Gk Solved objective Questions
Biology - General Knowledge Questions and Answers
Biology Gk Soved objective Questions

1. Major food crops of the world belong to
(a) leguminosae
(b) gramineae
(c) solanaceae
(d) cruciferae
Ans. (b)




2. An American plant, which had become a troublesome waterweed in India is
(a) Typha latifolia
(b) Trapa bispinosa
(c) Cyprus rotundus
d) Eichhornia crassipes
Ans. (d)

3. The major drawback of DDT as a pesticide is that
(a) it is significantly less effective than other pesticides
(b) its cost of production is high
(c) it is not readily and rapidly degraded in nature
(d) Organisms at once develop resistance to it
Ans. (c)

4. Autotrophs and heterotrophs differ in
(a) How they obtain their carbon
(b) Whether they are prokaryotic or eukaryotic
(c) How they reproduce, sexually or asexually
(d) Whether they use chemicals or light as a source of energy
Ans. (a)

5. Removal of topsoil by wind and water is called
(a) soil consecration
(b) Soil binding
(c) Soil erosion
(d) Mulching
Ans. (c)

6. Which of the following is an example of a weed of kharif season that infest maize crop?
(a) Amaranthus (chauli)
(b) Nut grass (motha)
(c) Sorghum (jangali jowar)
(d) All of the above
Ans. (d)

7. Green manuring enhances crop yield by
(a) 5—10%
(b) 15—25%
(c) 30—50%
(d) 60—75%
Ans. (c)


8. Nitrogen content of urea is
(a) 46%
(b) 36%
(c) 26%
(d) 56%
Ans. (a)

9. The science of improving crop varieties is called
(a) Hybridization
(b) Selection
(c) Introduction
(d) Plant breeding
Ans. (d)

10. Growing two or more crops but in definite row pattern is known as
(a) Intercropping
(b) Crop rotation
(c) Mixed farming
(d) Mixed cropping
Ans. (a)

11. Green revolution refers to
(a) Maintaining soil fertility
(b) Use of green plants for covering the earth
(c) Development of new crop varieties which helped to overcome hunger
(d) Growing green plants to establish balance of nature
Ans. (c)

12. Recognition for bringing green revolution to India goes to
(a) M.S. Swaminathan
(b) Norman Borlaug
(c) B.P. Pal
(d) Gurdev S. Khush
Ans. (a)

13. The Jersey bull used for cross breeding is exotic variety from
(a) USA
(b) UK
(c) Switzerland
(d) Holland
Ans. (a)

14. Fever, inflammation of the mucous membranes, particularly the intestines, discharges from the eyes and nose, dehydration, and skin eruptions on the back and flanks; death comes after four to eight days. These are the major symptoms of
(a) Rinderpest
(b) Anthrax
(c) Foot and Mouth Disease
(d) Cholera
Ans. (a)

15. Sharbati Sonora variety of wheat was obtained by
(a) Crossing with wild varieties of wheat
(b) Hybridization between wild varieties of wheat
(c) X-ray treatment
(d) Irradiation of Sonora 64 with gamma rays
Ans. (d)

16. Horti-pastoral farming refers to
(a) Growing food and fodder
(b) Growing mixed crops
(c) Growing fodder and rearing cattle, etc.
(d) Growing fruit trees and fodder simultaneously
Ans. (d)

17. Which is the oldest breeding method?
(a) Hybridization
(b) Selection
(c) Mutation
(d) Introduction
Ans. (d)

18. The technique in which the developing embryo (at definite stage) from a pregnant superior breed is removed and transferred to another female with inferior characters, in whose body further development till birth takes place
(a) Embryo transfer
(b) Artificial insemination
(c) Protoplast fusion
(d) Cloning
Ans. (a)

19. Silver Revolution is associated with the increase in the production of
(a) Meat
(b) Cereals
(c) Eggs
(d) Milk
Ans. (c)

20. Catla and rohu are examples of
(a) Freshwater fish
(b) Marine fish
(c) Brackish water fish
(d) None of these
Ans. (a)

21. The IPN (Infectious Pancreatic Necrosis) and VMS (Viral Hemorrhagic Septicemia) are well known infectious diseases of
(a) Fish
(b) Cattle
(c) Poultry
(d) None of the above
Ans. (a)

22. The production of useful aquatic plants and animals like prawns, fish, lobsters, crabs, molluscs, etc., using various types of water resources is called
(a) Aquaculture
(b) Pisciculture
(c) Silviculture
(d) Silver revolution
Ans. (a)

23. Mehsana and Jaffarabadi are examples of
(a) Indian breeds of buffaloes
(b) Breeds of cow
(c) Breeds of sheep
(d) Indian breeds of goat
Ans. (a)

24. Bombay duck and hilsa are examples of
(a) Freshwater fish
(b) Marine fish
(c) Breeds of sheep
(d) Breeds of ducks
Ans. (b)

25. Human genome contains about
(a) 10,000 nucleotides
(b) 10,000 genes
(c) 6 billion nucleotides
(d) 6 billion genes
Ans. (c)