Que- In the atmosphere, tiny solid or liquid suspended particles of various composition are called:
a. Aerosols
b. Carcinogens
c. Greenhouse gases
d. Microbes
Answer- Aerosols
Explanation- Aerosols are tiny solid or liquid particles that are suspended in the air. Most aerosols are microscopic and too small to see individually without a microscope. Aerosols include things like dust, pollen, smoke, and even cloud droplets.
Que- What is meant by GM foods?
a. Growth modified foods
b. Genetically modified food
c. Growth marked foods
d. Good mobility food
Answer- Genetically modified food
Explanation- GM foods genetically modified food.
Que- Which of the following gas is present at a very high concentration in our environment?
a. O2
b. CO2
c. H2
d. N2
Answer- N2
Explanation- N2 is present at a very high concentration in our environment.
Que- _________ refers to the phenomenon in that the organisms are exclusively restricted to a given area.
a. Ecosystem
b. Endemism
c. Habitat
d. Food web
Answer- Endemism
Explanation- Endemism refers to the phenomenon in that the organisms are exclusively restricted to a given area.
Que- Exponential growth occurs when there is
a. A great environmental resistance
b. No environmental resistance
c. No biotic potential
d. A fixed carrying capacity
Answer- No environmental resistance
Explanation- Exponential growth occurs when there is no environmental resistance.
Que- An increase in albedo would be accompanied by ____ in radiative equilibrium temperature.
a. An increase
b. A decrease
c. No change
d. Unstable oscillations
Answer- A decrease
Explanation- An increase in albedo would be accompanied by a decrease in radiative equilibrium temperature.
Que- Many wild plant and animals are on the verge of extinction due to
a. Habitat destruction
b. Climatic changes
c. Non availability of food
d. None of the above
Answer- Habitat destruction
Explanation- But sometimes extinctions happen at a higher and a faster rate than usual. Factors such as over-exploitation, large body size, small population, massive habitat loss and position at a higher trophic level favor extinction. A plant podophyllum is at the verge of extinction due to over-exploitation.
Que- Most harmful environmental pollutants are
a. natural nutrients in excess
b. human organic wastes
c. non-biodegradable chemicals
d. waste animal feed
Answer- non-biodegradable chemicals
Explanation- Most harmful environmental pollutants are non-biodegradable chemicals.
Que- The destruction of the forest areas by man made efforts is called
a. Afforestation
b. Deforestation
c. Non-forestation
d. Bio forestation
Answer- Deforestation
Explanation- Deforestation, clearance, clearcutting or clearing is the removal of a forest or stand of trees from land which is then converted to a non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests.
Que- The pyramid of number of a parasitic food chain in forest ecosystem is
a. always inverted
b. always upright
c. mixture of inverted and upright
d. sometimes inverted and sometimes upright
Answer- always inverted
Explanation- The pyramid of number of a parasitic food chain in forest ecosystem is always inverted.
Que- The intensity of earthquake is measured in ____________
a. Beaufort scale
b. Richter scale
c. Mohs scale
d. Joules
Answer- Richter scale
Explanation- The intensity of earthquake is measured in Richter scale.
Que- The most widely used pesticides function by disrupting
a. neurological cellular function
b. endocrine function
c. molecular events
d. renal function
Answer- neurological cellular function
Explanation- The most widely used pesticides function by disrupting neurological cellular function.
Que- Diversity of organisms include three Domains such as
a. bacteria, archae, eukarya
b. binomial system of classification
c. monera, protista, fungi, plantae, animalia
d. membrane bound organelles, no peptidoglycan in cell walls, introns
Answer- bacteria, archae, eukarya
Explanation- Organisms can be classified into one of three domains based on differences in the sequences of nucleotides in the cell's ribosomal RNAs (rRNA), the cell's membrane lipid structure, and its sensitivity to antibiotics. The three domains are the Archaea, the Bacteria, and the Eukarya.
Que- What do you call the rain that contains chemical waste and cause damage to plants and animals?
a. Smog
b. Acid rain
c. Monsoon rain
d. Seasonal rain
Answer- Acid rain
Explanation- The sulphur oxides (combination of sulphur and oxygen) react with the water vapour in the air to form very strong acids like sulphuric acid (h2so4). these acids fall along with the rain and hence the name acid rain. this rain is very harmful for plant and animal life.
Que- Ecology is
a. The science that studies the evolution of life,
b. Integrates both social and natural sciences to help us understand how the earth works,
c. The study of the relationships between organisms and their environment
d. The study of the environment in the absence of humans
Answer- The study of the relationships between organisms and their environment
Explanation- Ecology is a branch of biology concerning interactions among organisms and their biophysical environment, which includes both biotic and abiotic components.
Que- Which of the following is false?
a. Quantity of biomass in a trophic level at a particular period is called as standing crop
b. The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
c. The succession that occurs in newly cooled lava is called primary succession
d. Rate of succession is faster in secondary succession
Answer- The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
Explanation- The energy content in a trophic level is determined is determined by considering a few individuals of a species in that trophic level.
Que- If the amount of energy lost by the earth to space each year were not approximately equal to that received:
a. The atmosphere's average temperature would change
b. The length of the year would change
c. The sun's output would change
d. The mass of the atmosphere would change
Answer- The atmosphere's average temperature would change
Explanation- The atmosphere's average temperature would change.
Que- The sun emits its greatest intensity of radiation in:
a. The visible portion of the spectrum
b. The infrared portion of the spectrum
c. The ultraviolet portion of the spectrum
d. The x-ray portion of the spectrum
Answer- The visible portion of the spectrum
Explanation- The sun emits it greatest intensity of radiation in: the visible region of the spectrum. The temperature of a rising parcel: cools as its molecules expand in less dense air.
Que- The main reason why vegetables take longer to cook in boiling water at high altitudes is because:
a. Water boils at a higher temperature with higher altitude
b. The temperature of the boiling water decreases with increasing altitude
c. There is less oxygen in the air at high altitude
d. Saturation vapor pressure decreases with increasing altitude
Answer- The temperature of the boiling water decreases with increasing altitude
Explanation- Because water boils at a lower temperature at higher elevations, foods that are prepared by boiling or simmering will cook at a lower temperature, and it will take longer to cook. High altitude areas are also prone to low humidity, which can cause the moisture in foods to evaporate more quickly during cooking.
Que- The temperature scale that sets freezing of pure water at 32o F:
a. Kelvin
b. Fahrenheit
c. Celsius
d. British
Answer- Fahrenheit
Explanation- Under this system, the Fahrenheit scale is redefined slightly so that the freezing point of water is exactly 32 °F, and the boiling point is exactly 212 °F or 180 degrees higher.
Que- The pollutant that causes hole in the ozone layer is
a. SF6
b. nitrousoxide
c. CFCs
d. PFCs
Answer- CFCs
Explanation- Chlorofluorocarbons (CFCs) and other halogenated ozone depleting substances (ODS) are mainly responsible for man-made chemical ozone depletion. The total amount of effective halogens (chlorine and bromine) in the stratosphere can be calculated and are known as the equivalent effective stratospheric chlorine (EESC).
Que- Ozone depletion is mostly caused by
a. CO2
b. CCL
c. CFCs
d. CO
Answer- CFCs
Explanation- Ozone depletion occurs when chlorofluorocarbons (CFCs) and halons—gases formerly found in aerosol spray cans and refrigerants—are released into the atmosphere.
Que- Which one of the following is the correct percentage of the two green house gases that contribute to the total global warming?
a. N2O-6%, CO2 -86%
b. Methane-20%, N2O-18%
c. CFCs -14%, Methane-20%
d. CO2-40%,CFCs-30%
Answer- Methane-20%, N2O-18%
Explanation- Methane-20%, N2O-18% is the correct percentage of the two green house gases that contribute to the total global warming.
Que- Pick out the potent green house gas
a. CO2
b. N2O
c. CH4
d. O3
Answer- CH4
Explanation- Methane (CH4) is the potent green house gas.
Que- Assuming that the night will remain clear, calm, and unsaturated, the predicted minimum temperature is 32oF. Suddenly the wind speed increases and remains gusty throughout the night. The minimum temperature will most likely be:
a. About the same as predicted but will occur earlier in the night
b. Higher than predicted due to the release of latent heat
c. Much lower than predicted due to radiational cooling
d. Higher than predicted due to mixing
Answer- Higher than predicted due to mixing
Explanation- The minimum temperature will most likely be higher than predicted due to mixing.