Que- Renewable energy resources are mostly based on
a. biomass
b. fossil fuels
c. nuclear power
d. nuclear power
Answer- biomass
Explanation- Renewable energy resources are mostly based onbiomass.
Que- __________ was developed after World War II.
a. Wind energy
b. Solar energy
c. Nuclear power
d. Thermal power
Answer- Nuclear power
Explanation- Nuclear power was developed after World War II.
Que- The term " Nuclear winter " is associated with
a. Nuclear War
b. Nuclear disarmament
c. Nuclear weapon testing
d. After effect of a nuclear explosion
Answer- After effect of a nuclear explosion
Explanation- Nuclear winter is a severe and prolonged global climatic cooling effect hypothesized to occur after widespread firestorms following a nuclear war. The hypothesis is based on the fact that such fires can inject soot into the stratosphere, where it can block some direct sunlight from reaching the surface of the Earth.
Que- Which of the following group of gases cause photochemical smog?
a. Ozone, PAN and CO
b. HC, NO and PAN
c. O2, PAN, and NO2
d. O3, PAN and NO2
Answer- O3, PAN and NO2
Explanation- O3, PAN and NO2 cause photochemical smog.
Que- Soil chemistry is considered an __________ factor
a. topographic
b. econtonal
c. biologic
d. edaphic
Answer- edaphic
Explanation- Soil chemistry is considered an edaphic factor.
Que- Trichodermaharzianum has proved a useful microorganism for
a. reclamation of wastelands
b. bioremediation of contaminated soils
c. biological control of soil-borne plant pathogens
d. gene transfer in higher plants
Answer- bioremediation of contaminated soils
Explanation- Trichoderma harzianum has proved a useful microorganism for bioremediation of contaminated soils.
Que- The occurrence of pesticides like DDT in higher trophic levels is termed as
a. bioremediation
b. biomagnification
c. biological enhancement
d. biopollution
Answer- biomagnification
Explanation- Biomagnification, also known as bioamplification or biological magnification, is any concentration of a toxin, such as pesticides, in the tissues of tolerant organisms at successively higher levels in a food chain.
Que- The study of food chains and food webs is observed in the phenomenon known as
a. biological chain
b. ecosystem
c. biological magnification
d. energy flow
Answer- biological magnification
Explanation- The study of food chains and food webs is observed in the phenomenon known as biological magnification.
Que- BOD stands for
a. Biological Oxygen Decrease
b. Biotic Oxygen Demand
c. Biological Oxygen Demand
d. None of the above
Answer- Biological Oxygen Demand
Explanation- BOD stands for Biological Oxygen Demand. It is the amount of dissolved oxygen required by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.
Que- What is the major cause of diminishing wildlife number?
a. Felling of trees
b. Cannibalism
c. Habitat destruction
d. Paucity of drinking water
Answer- Habitat destruction
Explanation- The reasons are deforestation, pollution, killing, over exploitation etc. The most important among them is deforestation or destruction of their natural habitat because it will affect the species (flora and fauna) of complete area and not only the few organisms.
Que- The destruction of habitat of plants and animals is called
a. endemism
b. endangered species
c. habitat loss
d. flood
Answer- habitat loss
Explanation- Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or die, thereby reducing biodiversity and species abundance.
Que- Organ affected by pneumonia
a. Liver
b. Kidney
c. Heart
d. Lungs
Answer- Lungs
Explanation- Pneumonia is an infection of the lungs that may be caused by bacteria, viruses, or fungi. The infection causes the lungs' air sacs (alveoli) to become inflamed and fill up with fluid or pus. That can make it hard for the oxygen you breathe in to get into your bloodstream.
Que- _________ is essentially stored solar energy that can be converted in to electricity, fuel and heat.
a. Biomass
b. Fossil
c. Heat
d. Coal
Answer- Biomass
Explanation- Biomass is essentially stored solar energy that can be converted in to electricity, fuel and heat.
Que- This is used as an index for fuel consumption:
a. Growing degree-days
b. Consumer price index
c. Heating degree-days
d. Mean annual temperature
Answer- Heating degree-days
Explanation- This is used as an index for fuel consumption heating degree-days.
Que- In an aquatic ecosystem, the depth to which light penetrates is called
a. aphotic
b. photic
c. euphotic
d. nonphotic
Answer- photic
Explanation- The layer of the ocean that receives light is called the photic zone. It is categorized into the euphotic and disphotic zone. Euphotic zone is the uppermost layer of the ocean where sufficient light for photosynthesis is found.
Que- Algal bloom results in
a. Global warming
b. Salination
c. Eutrophication
d. Biomagnification
Answer- Eutrophication
Explanation- Algal bloom results in eutrophication.
Que- The maximum in daytime surface temperature typically occurs _______ the earth receives its most intense solar radiation.
a. Before
b. After
c. Exactly when
d. Long time
Answer- After
Explanation- The maximum in daytime surface temperature typically occurs after the earth receives its most intense solar radiation.
Que- The resources that can be replaced by natural ecological cycle is called
a. Renewable
b. non-renewable
c. exhaustible
d. natural
Answer- Renewable
Explanation- Renewable resources are natural resources that can be regenerated or replaced by ecological processes on a relevant timescale. They include biological resources such as biomass, plants, and animals. They also include freshwater, fresh air, soil fertility, and elements like carbon and nitrogen.
Que- The portion of the earth and its environment which can support life is known as _________
a. Crust
b. Biosphere
c. Exosphere
d. atmosphere
Answer- Biosphere
Explanation- The portion of the earth and its environment which can support life is known as biosphere.
Que- Upper layer of water in a single body of water is known as
a. Hypolimnion
b. Epilimnion
c. Thermocline
d. Hydroline
Answer- Epilimnion
Explanation- Upper layer of water in a single body of water is known as Epilimnion.
Que- The lower limit of water availability in soil is known as
a. Field capacity
b. Hypolimnion
c. Thermocline
d. Wilting point
Answer- Wilting point
Explanation- The permanent wilting point is considered as the lower limit of plant-available soil water and depends upon both plant and soil characteristics. The quantity of water held by the soil between the field capacity and permanent wilting point is considered as the plant-available water.
Que- The top layer of the lake is called as
a. Thermocline
b. Epilimnion
c. Thermonion
d. Hypolimnion
Answer- Epilimnion
Explanation- Lake stratification is the separation of lakes into three layers: Epilimnion: the top of the lake. Metalimnion (or thermocline): the middle layer, which may change depth throughout the day. Hypolimnion: the bottom layer.
Que- The atmospheric layer in which we live is called the:
a. Troposphere
b. Stratosphere
c. Thermosphere
d. Ionosphere
Answer- Troposphere
Explanation- The troposphere is the lowest layer of the atmosphere. This is the layer where we live and where weather happens. Temperature in this layer generally decreases with height. The boundary between the stratosphere and the troposphere is called the tropopause.
Que- The hottest atmospheric layer is the:
a. Stratosphere
b. Mesosphere
c. Thermosphere
d. Troposphere
Answer- Thermosphere
Explanation- Because there are relatively few molecules and atoms in the thermosphere, even absorbing small amounts of solar energy can significantly increase the air temperature, making the thermosphere the hottest layer in the atmosphere. Above 124 mi (200 km), the temperature becomes independent of altitude.
Que- When the two ecosystems overlap each other, the area is called
a. Habitat
b. Niche
c. Ecotone
d. Ecotype
Answer- Ecotone
Explanation- An ecotone is a transition area between two biomes. It is where two ecosystems overlap each other. It may be narrow or wide, and it may be local (the zone between a field and forest) or regional (the transition between forest and grassland ecosystems).