Free Man and His Environment MCQs with Answers
382 Man and His Environment MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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Read the Man and His Environment notesFree MDCAT chapter notes with key terms382 questions · page 12 of 20
- A. Nilgai
- B. Cheetal
- C. Kashmiri goat
- D. Chiru
Explanation: The source of the world's finest, lightest, warmest, and most expensive wool known as "shahtoosh" is the Tibetan antelope, also known as…
Correct answer: Chiru- A. Predation
- B. Cutting down of forest
- C. Destruction of habitat
- D. Hunting
Explanation: Wildlife refers to all living organisms (terrestrial, aquatic and aerial) living in all possible natural habitats of their own, other than…
Correct answer: Destruction of habitat- A. Madagascar
- B. Mauritius
- C. India
- D. Sri Lanka
Explanation: The indri (Indri indri) is a large, arboreal lemur species found in the eastern rainforests of Madagascar.
Correct answer: Madagascar- A. Gene banks
- B. Gene libraries
- C. Herbariums
- D. Gene pools
Explanation: The viable material of an endangered species can be preserved by gene banks.
Correct answer: Gene banks- A. Felling of trees
- B. Paucity of drinking water
- C. Cannibalism
- D. Habitat destruction
Explanation: Wildlife refers to all living organisms (terrestrial, aquatic and aerial) living in all possible natural habitats of their own, other than…
Correct answer: Habitat destruction- A. Pollution of air and water.
- B. Hunting for valuable wildlife products.
- C. Introduction of alien species.
- D. Alteration and destruction of the natural habitats.
Explanation: Wildlife refers to all living organisms (terrestrial, aquatic and aerial) living in all possible natural habitats of their own, other than…
Correct answer: Alteration and destruction of the natural habitats.- A. They alter rainfall and monsoon patterns.
- B. They cause increased agricultural productivity.
- C. They have negative impact on agricultural land.
- D. They are harmful to human health.
Explanation: Aerosols are harmful environmental pollutants which have negative effects on agriculture.
Correct answer: They cause increased agricultural productivity.- A. Domestic sewage
- B. Dairy industry
- C. Petroleum industry
- D. Sugar industry
Explanation: Biochemical Oxygen Demand (BOD) is a commonly used water quality parameter that measures the amount of dissolved oxygen consumed by…
Correct answer: Petroleum industry- A. Increased population of aquatic organisms due to minerals.
- B. Drying of the lake due to algal bloom.
- C. Increased population of fish due to lots of nutrients.
- D. Mortality of fish due to lack of oxygen.
Explanation: High amount of organic waste in a lake will trigger and activate decomposer microbes which will decompose organic waste.
Correct answer: Increased population of aquatic organisms due to minerals.- A. Phytoplankton
- B. Seagull
- C. Crab
- D. Eel
Explanation: DDT is non-biodegradable and is not metabolized within the body of an organism; rather it accumulates in the fat tissues therefore its…
Correct answer: Seagull- A. Ammonia
- B. Methane
- C. Nitrous oxide
- D. Ozone
Explanation: Ozone layer or shield is present in stratosphere. It functions as a shield against strong UV radiations coming from sun.
Correct answer: Ozone- A. An increased production of fish due to biodegradable nutrients.
- B. Death of fish due to lack of oxygen.
- C. Drying of the river very soon due to algal bloom.
- D. Increased population of aquatic food web organisms.
Explanation: High amount of organic waste in a lake will trigger and activate decomposer microbes which will decompose organic waste.
Correct answer: Death of fish due to lack of oxygen.- A. CO2 and CO
- B. O3 and dust
- C. SO2 and NO2
- D. SO3 and CO
Explanation: Acid rain is rainfall and other forms of precipitation with a pH of less than 5.
Correct answer: SO2 and NO2234. Eutrophication of water bodies leading to killing of fishes is mainly due to non-availability of:
- A. Essential minerals
- B. Oxygen
- C. Food
- D. Light
Explanation: Eutrophication is the excessive growth of algae, plants and animals in water bodies due to the nutrient enrichment particularly with…
Correct answer: Oxygen- A. Algae
- B. Fungi
- C. Lichens
- D. Conifers
Explanation: Lichens are very sensitive to SO2 pollution. They are completely destroyed at places where there is SO2 pollution in atmosphere.
Correct answer: Lichens- A. Biotransformation
- B. Biogeochemical cycling
- C. Biomagnification
- D. Biodeterioration
Explanation: Biomagnification, also known as bioamplification or biological magnification, is a process that occurs in ecosystems where certain…
Correct answer: Biomagnification- A. Damage to eyes
- B. Increased liver cancer
- C. Increased skin cancer
- D. Reduced Immune System
Explanation: Ultraviolet radiations are of three types, i.e. UV-C (100 - 280 nm), UV-B (280 - 320nm) and UV-A (320 - 390nm).
Correct answer: Increased liver cancer- A. Water is less polluted.
- B. Consumption of organic matter in the water is higher by the microbes.
- C. Water is pure.
- D. Water is highly polluted.
Explanation: Biochemical oxygen demand or BOD is the oxygen required for microbial decomposition of a unit mass of organic remains.
Correct answer: Consumption of organic matter in the water is higher by the microbes.- A. Trees are very healthy
- B. Trees are heavily infested
- C. Location is highly polluted
- D. Location is not polluted
Explanation: Lichens are very sensitive to SO2 and pollution and are completely destroyed at places with the presence of these substances.
Correct answer: Location is not polluted- A. Ionosphere
- B. Mesosphere
- C. Stratosphere
- D. Troposphere
Explanation: Ozone layer or shield is present in stratosphere. It functions as a shield against strong UV radiations coming from sun.
Correct answer: Stratosphere