Biology Times (^19)
March
- Quinine ,an antimalarial drug is obtained from
Quesqualis
(a) True (b) False
(c) Undefined (d) Both b & c
41.W.P.S. I stands for
(a) The Wild life Preservation Society of India
(b) The world wild life preservation society
Institute
(c) Western wild life preservation society of
India
(d) Wild life protection society of india - Limit of BOD prescribed by Central Pollution
Control Board for the discharge of industrial and
municipal waste water into natural surface is
(a) ˂3.0 ppm (b) ˂10 ppm
(c) ˂100 ppm (d) ˂30ppm - Common indicator of air pollution is
(a) Lobaria pulmunaria
(b) Entamoeba histolytica
(c) Azolla filiculoides
(d) All the above - Organic waste from kitchen and Pollution from
animal excreta can be most profitably minimized
by
(a) Dumping them in river or lake
(b) Using them directly as biofertilizers
(c) Using them for producing biogas
(d) Storing them in underground storage tanks. - Acid rain in big industrial cities are due to the
effect of atmospheric pollution by
(a) Excessive release of NH 3 by coal gas
industries
(b) Excessive release of CO by incomplete
burning of carbonaceous fuels
(c) Excessive release of CO 2 by burning wood
(d) More release of NO 2 and SO 2 by burning
of fossil fuels - c 2. d 3. c 4. c 5. c
- d 7. c 8. a 9. c 10. a
- a 12. a 13. b 14. b 15. d
- a 17. d 18. a 19. b 20. d
- b 22. a 23. b 24. c 25. b
- d 27. c 28. d 29. b 30. c
- c 32. c 33. c 34. b 35. a
- d 37. a 38. c 39. c 40. b
- a 42. b 43. a 44. c 45. d
1.Sol: Mammals evolved from a group of reptiles
called the synapsids. These reptiles arose during
the Pennsylvanian Period (310 to 275 million
years ago).
2.Sol:Gold fish belongs to Actinopterygii and possess
air bladder or swim bladder which provides
buoyancy to the body. Rays and sharks lack swim
bladder. Starfish is an invertebrate.
3.Sol: The scientific name of King Cobra is Naja
Hannah.
4.Sol: On land , frog respire through buccal cavity,
skin and lungs. In water, frog respire through
skin (cutaneous respiration). Lungs are pair of
elongated pink hollow structures found in thorax.
During aestivation and hibernation gaseous
exchange takes place through skin.
5.Sol: The nodules of the plants contain nitrogen
fixing bacteria.
6.Sol: Dental formula expresses the number and
kinds of teeth possessed by a mammal.
7.Sol: Peyer’s patches are small masses of
lymphatic tissue found throughout the ileum
region of the small intestine.
8.Sol: The undigested, unabsorbed substances
called faeces enters into the caecum of the large
intestine through ileo-caecal valve, which prevents
the back flow of the faecal matter. It is temporarily
stored in the rectum till defaecation.
9.Sol: The Hering-Breuer reflex is initiated by
activation of stretch receptors in the lungs.
10.Sol:Portal system is the system of blood vessels
that begins and ends in the capillaries.
11.Sol: SA node →AV node →Bundle of His
→Purkinje fibres
12.Sol:Adrenal gland it is correctly mentioned.
It is located at the anterior part of kidney.
Secrete catecholmines which stimulate glycogen
breakdown.
13.Sol: Liver: Although considered a secondary, or
accessary excretory system organ, the liver plays
a vital part in keeping the body clean. Harmful
poisons and chemicals that are either produced
in the body or consumed are broken down and
detoxified by the liver. For example, a bi-product
of the metabolic process within the body is
ammonia and the liver processes this into urea,
a less harmful substance which continues to be
filtered and excreted by the kidneys as urine.