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 14 of 20
- A. Basal convention - Biodiversity conservation
- B. Kyoto protocol - Climatic change
- C. Montreal protocol - Global warming
- D. Ramsar convention - Ground water pollution
Explanation: The Kyoto Protocol is an international treaty aimed at addressing climate change by reducing greenhouse gas emissions which was adopted at…
Correct answer: Kyoto protocol - Climatic change- A. 20 mg / 100 m
- B. 30 mg / 100 ml
- C. 4 - 6 mg / 100 ml
- D. 10 mg / 100 ml.
Explanation: Lead (Pb) is released by the combustion of petrol because tetraethyl lead is used as an antiknocking in petrol.
Correct answer: 30 mg / 100 ml- A. Lemna pancicostata
- B. Eichhornia crassipes
- C. Escherichia coli
- D. Entamoeba histolytica
Explanation: E.coli is the most common indicator of water pollution. It naturally occurs in the intestines of human beings and animals.
Correct answer: Escherichia coli- A. Brain
- B. Heart
- C. Teeth
- D. Kidney
Explanation: Fluorides are given out during the refining of materials. Fluorides cause fluorosis.
Correct answer: Teeth- A. Heavy metals
- B. Faecal matter
- C. Industrial effluents
- D. Pollen of aquatic plants
Explanation: E.coli is the most common indicator of water pollution. It naturally occurs in the intestines of human beings and animals.
Correct answer: Faecal matter- A. Hydrilla
- B. Water hyacinth
- C. Larva of stone fly
- D. Blue green algae
Explanation: Stoneflies are extremely sensitive to water pollution. Their presence in a water body is an indicator of good water quality, while their…
Correct answer: Larva of stone fly- A. Cyanide
- B. Methyl isocyanate
- C. Lead
- D. Mercury
Explanation: Mercury is changed to water soluble dimethyl mercury which undergoes biomagnification.
Correct answer: Mercury268. D.D.T. is:
- A. Not a pollutant
- B. An antibiotic
- C. A non-degradable pollutant
- D. A biodegradable pollutant
Explanation: DDT is nonbiodegradable and is not metabolized within the body of an organism.
Correct answer: A non-degradable pollutant- A. Top carnivore
- B. Primary producers
- C. Herbivores
- D. Carnivores
Explanation: DDT is non-biodegradable and is not metabolized within the body of an organism, rather it accumulates in the fat tissues.
Correct answer: Top carnivore- A. Silicosis
- B. Pneumonicosis
- C. Fluorosis
- D. Leprosis
Explanation: Fluorides are given out during the refining of materials. Fluorides cause fluorosis.
Correct answer: Fluorosis- A. PAN
- B. Aerosol
- C. CO
- D. CO 2
Explanation: The formation of secondary pollutants is influenced by a combination of factors, including the presence of primary pollutant emissions…
Correct answer: PAN272. The maximum biomagnification would be in which of the following in the case of an aquatic ecosystem?
- A. Zooplankton
- B. Phytoplanktons
- C. Fishes
- D. Birds
Explanation: Heavy metals and persistent pesticides (e.g., chlorinated hydrocarbons like DDT) pass into the food chain and increase in amount per unit…
Correct answer: Fishes- A. They promote pollution
- B. Lichens are not related to pollution
- C. They treat the polluted water
- D. They act as bioindicators of pollutions
Explanation: Lichen biomonitoring has been widely used in environmental research and air quality assessment.
Correct answer: They act as bioindicators of pollutions- A. O2 layer
- B. O3 layer
- C. CO2 layer
- D. SO2 layer.
Explanation: Supersonic jets, like the Concorde, can potentially contribute to environmental pollution, particularly in the upper atmosphere.
Correct answer: O3 layer- A. Azospirillum
- B. Escherichia
- C. Eichhornia
- D. Chlorella
Explanation: E.coli is the most common indicator of water pollution. It naturally occurs in the intestines of human beings and animals.
Correct answer: Escherichia- A. Higher than the present
- B. Dependent on the amount of oxygen in the atmosphere.
- C. Same as present
- D. Less than the present
Explanation: Carbon dioxide is a greenhouse gas with a warming effect of 60%. Greenhouse gases are essential for keeping the earth warm and hospitable.
Correct answer: Less than the present- A. Reacts with haemoglobin
- B. Makes the nervous system inactive
- C. Reacts with O2
- D. Inhibits glycolysis
Explanation: Carbon monoxide is produced due to incomplete combustion, metallurgical operations and naturally by plants as well as animals.
Correct answer: Reacts with haemoglobin- A. By forming a stable compound with haemoglobin.
- B. By obstructing the reaction of oxygen with haemoglobin.
- C. By changing oxygen into carbon dioxide.
- D. By destroying the haemoglobin.
Explanation: Carbon monoxide (CO) prevents the transport of oxygen in the body tissues by interfering with the oxygen-carrying capacity of hemoglobin…
Correct answer: By forming a stable compound with haemoglobin.- A. Vibrio
- B. Entamoeba histolytica
- C. E.coli
- D. P. typhi
Explanation: E.coli is the most common indicator of water pollution. It naturally occurs in the intestines of human beings and animals.
Correct answer: E.coli- A. Water pollution
- B. Depletion of ozone layer
- C. Pollutants in air
- D. Use of detergents
Explanation: Ozone layer or shield is present in stratosphere. It functions as a shield against strong UV radiations coming from sun.
Correct answer: Depletion of ozone layer