Que- Eutrophication of water bodies resulting to killing of fishes is mainly due to non-availability of
a. Food
b. Light
c. Oxygen
d. Essential minerals
Answer- Oxygen
Explanation- The concentration of the oxygen would fall and this causes the death of the aquatic animals due to the suffocation. Hence, the correct answer is 'non-availability of oxygen'.
Que- _________ power station at the mouth of the river blocks the flow of polluted water into the sea.
a. Thermal
b. Nuclear
c. Tidal
d. Wind
Answer- Tidal
Explanation- Tidal power station at the mouth of the river blocks the flow of polluted water into the sea.
Que- What is the animal symbol of W. W. F (World Wildlife Fund) ?
a. Red Panda
b. Giant Panda
c. Tiger
d. Kangaroo
Answer- Giant Panda
Explanation- Adored around the world, the distinctive black and white animal is a national treasure in China and has been the symbol of WWF since its formation in 1961. While its numbers are slowly increasing, the giant panda remains one of the rarest and most endangered bears in the world.
Que- Minamata disease was caused by pollution of water by
a. Mercury
b. Lead
c. Tin
d. Methyl iso cyanate
Answer- Mercury
Explanation- Minamata disease (M. d.) is methylmercury (MeHg) poisoning that occurred in humans who ingested fish and shellfish contaminated by MeHg discharged in waste water from a chemical plant.
Que- What is " temporary threshold shift " ?
a. Hearing loss due to excessive noise
b. Noise that is untolerable
c. Tolerable noise
d. inaudible noise
Answer- Hearing loss due to excessive noise
Explanation- A temporary threshold shift is a temporary shift in the auditory threshold. It may occur suddenly after exposure to a high level of noise, a situation in which most people experience reduced hearing. A temporary threshold shift results in temporary hearing loss.
Que- In an average year, more people die from this than from any other natural disaster.
a. Lightning
b. Earthquakes
c. Tornadoes
d. Flash floods and flooding
Answer- Flash floods and flooding
Explanation- In an average year, more people die from flash floods and flooding than from any other natural disaster.
Que- The source of aerosol in upper atmosphere is
a. sea currents
b. petroleum based industries
c. jet planes
d. ruminants
Answer- jet planes
Explanation- The source of aerosol in upper atmosphere is jet planes.
Que- Noise is measured using sound meter and the unit is
a. hertz
b. decibel
c. joule
d. sound
Answer- decibel
Explanation- Noise of sound measurement is called decibels (dB).
Que- The concept of ecological pyramid was first proposed by
a. E.P. Odum
b. A.G. Tansley
c. Juday
d. Charles Elton
Answer- Charles Elton
Explanation- Just as the name suggests ecological pyramids are in the shape of a pyramid. The concept was first introduced by Charles Elton, the pioneer British Ecologist. The bottom of an ecological pyramid is the broadest and is occupied the producers, which form the first trophic level.
Que- When it is January and winter in the Northern Hemisphere, it is ______and ________in the Southern Hemisphere.
a. January and summer
b. January and winter
c. July and winter
d. July and summer
Answer- January and summer
Explanation- When it is January and winter in the Northern Hemisphere, it is January and summer in the Southern Hemisphere.
Que- The World Wetlands Day is celebrated on ________
a. February 02
b. February 28
c. June 05
d. March 21
Answer- February 02
Explanation- World Wetlands Day is celebrated every year on 2 February to raise global awareness about the value of wetlands for humanity and the planet. It also marks the adoption of the Ramsar Convention on Wetlands in 1971 in the Iranian city of Ramsar.
Que- Flag ship species of Choolannur sanctuary
a. Tiger
b. Peacock
c. Elephant
d. Rhino
Answer- Peacock
Explanation- Flag ship species of Choolannur sanctuary is Peacock.
Que- Chemical reactions triggered by ________ transforms the organic material into hydrocarbons.
a. solar energy
b. hydroelectric
c. elevated temperatures
d. decomposition
Answer- elevated temperatures
Explanation- Chemical reactions triggered by elevated temperatures transforms the organic material into hydrocarbons.
Que- Sunlight that bounces off a surface is said to be ________ from the surface.
a. Radiated
b. Absorbed
c. Emitted
d. Reflected
Answer- Reflected
Explanation- Sunlight that bounces off a surface is said to be reflected from the surface.
Que- If we uncover half of the forest, covering of the earth, what crisis will be produced at most and at first?
a. Some species will be extincted
b. Population and ecological imbalance will rise up
c. Energy crisis will occur
d. Rest half forests will maintain this imbalance
Answer- Some species will be extincted
Explanation- Some species will be extincted.
Que- An example of one way ecological cycle is
a. carbon dioxide cycle
b. water cycle
c. energy cycle
d. oxygen cycle
Answer- energy cycle
Explanation- An example of one way ecological cycle is energy cycle.
Que- Which of the processes is used to dispose the radioactive wastes?
a. ground storage
b. ocean disposal
c. landfills
d. vary based on activity
Answer- vary based on activity
Explanation- Vary based on activity is used to dispose the radioactive wastes.
Que- What is Plankton?
a. Microscopic floating organisms - Plants and animals.
b. bottom dwelling aquatic organisms
c. large plants in water
d. none
Answer- Microscopic floating organisms - Plants and animals.
Explanation- Plankton are the diverse collection of organisms that live in large bodies of water and are unable to swim against a current. The individual organisms constituting plankton are called plankters. They provide a crucial source of food to many small and large aquatic organisms, such as bivalves, fish and whales.
Que- In summer, humid regions typically have ________ daily temperature ranges and _______ maximum temperatures than drier regions.
a. Smaller, lower
b. Smaller, higher
c. Larger, lower
d. Larger, higher
Answer- Smaller, lower
Explanation- In summer, humid regions typically have smaller daily temperature ranges and lower maximum temperatures than drier regions.
Que- Heat transferred outward from the surface of the moon can take place by:
a. Convection
b. Conduction
c. Latent heat
d. Radiation
Answer- Radiation
Explanation- In space, heat gets transferred by radiation. This is mainly in the infrared band of electromagnetic waves. Earth, gets heated up due to earth's atmosphere and also due to greenhouse effect.
Que- Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the tops of parked cars, even when the air temperature is above freezing. This condition happens because the tops of the cars are cooling by:
a. Conduction
b. Convection
c. Latent heat
d. Radiation
Answer- Radiation
Explanation- Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the top of parked cars, even when the air temperature is above freezing. This happens because the tops the tops of the cars are cooled by radiation.
Que- Zoos are examples for
a. In-situ conservation
b. in-vivo conservation
c. ex-situ conservation
d. exvivo conservation
Answer- ex-situ conservation
Explanation- Zoos are examples for ex-situ conservation.
Que- Red sea is an example of a ________ structure.
a. Folded
b. lava
c. Faulted
d. residual
Answer- Faulted
Explanation- Red sea is an example of a faulted structure.
Que- Which of the following is not an indicative biological trait for the trait of ecology?
a. Fish reproductive strategy
b. Habitat
c. Feeding behavior
d. Fish stream size preference
Answer- Fish reproductive strategy
Explanation- Fish reproductive strategy is not an indicative biological trait for the trait of ecology.
Que- When is the World Wildlife week ?
a. First week of September
b. Last week of September
c. First week of October
d. Last week of October
Answer- First week of October
Explanation- Wildlife week is celebrated all over the country in the month of October from 2nd to 8th every year with the view to preserve the fauna, i.e., the animal life of the India.