Free Forest Ecology MCQs with Answers
837 Forest Ecology MCQs from Forestry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Last updated
837 questions · page 12 of 42
- A. Barium
- B. Iron
- C. Cadmium
- D. Mercury
Explanation: Cadmium contamination in Japan caused itai-itai disease, characterized by severe bone and kidney damage.
Correct answer: Cadmium- A. Air traffic directions
- B. Sirens of every kind
- C. Traffic on high ways
- D. Noise producing devices
Explanation: Sonic booms are produced by aircraft flying faster than the speed of sound, so they are controlled through regulation and direction of air…
Correct answer: Air traffic directions- A. Ocimum basilicum
- B. Both (a) & (b)
- C. Azadirachta indica
- D. Dalbergia sissoo
Explanation: Both Ocimum basilicum (basil) and Azadirachta indica (neem) contain compounds used for insecticidal or insect-repellent purposes.
Correct answer: Both (a) & (b)- A. Jun-44
- B. Sep-44
- C. Jul-45
- D. Aug-45
Explanation: The first nuclear explosion, code-named Trinity, was conducted by the United States on 16 July 1945 in New Mexico.
Correct answer: Jul-45- A. Traffic sirens
- B. Sirens and loud speakers
- C. Industries
- D. Kitchen appliances, radio and TV
Explanation: In residential areas, household sources such as kitchen appliances, radios and televisions are the characteristic contributors to noise…
Correct answer: Kitchen appliances, radio and TV- A. Air, soil and water
- B. Soil and water both
- C. Air and water both
- D. Soil only
Explanation: Radioactive fallout consists of radioactive particles and materials that can be transported through the air and deposited on soil and…
Correct answer: Air, soil and water- A. Drying of the lake very soon due to algal bloom
- B. Death of fish due to lack of oxygen
- C. Increased population of aquatic food web organisms
- D. An increased production of fish due to lot of nutrients
Explanation: Organic sewage initially promotes algal growth, but its decomposition consumes dissolved oxygen in the water.
Correct answer: Death of fish due to lack of oxygen- A. August, 8th
- B. August, 9th
- C. August, 6th
- D. August, 4th
Explanation: The first atomic bomb used in war was detonated over Hiroshima on 6 August 1945. The bombing of Nagasaki followed on 9 August.
Correct answer: August, 6th- A. Chernobyl
- B. Trombay
- C. Narora
- D. TMI-2
Explanation: The Three Mile Island Unit 2 accident in the United States in 1979 is generally regarded as the first major commercial nuclear reactor…
Correct answer: TMI-2- A. 0.01 ppm
- B. 0.001 ppm
- C. 0.5 ppm
- D. 0.75 ppm
Explanation: The approximate background concentration of sulphur dioxide in clean atmospheric air is commonly given as about 0.01 ppm in environmental…
Correct answer: 0.01 ppm231. A hydrocarbon having the following number of carbon atoms doesn't exist freely in the atmosphere:
- A. C16
- B. C18
- C. Both (a) & (b)
- D. C10
Explanation: C16 and C18 hydrocarbons have high molecular masses and very low volatility, so they are not normally present as freely circulating…
Correct answer: Both (a) & (b)- A. Geneva
- B. Islamabad
- C. Sydney
- D. Rio-de-Janeiro
Explanation: The 1992 Earth Summit, formally the United Nations Conference on Environment and Development, was held in Rio de Janeiro, Brazil.
Correct answer: Rio-de-Janeiro- A. Non-gaseous
- B. Mainly gaseous
- C. Gaseous
- D. Mainly non-gaseous
Explanation: Particulate matter consists of suspended solid particles and liquid droplets such as dust, soot, smoke and aerosols, so it is classified…
Correct answer: Non-gaseous- A. Phosphene
- B. SiF4
- C. Dust
- D. Halogens
Explanation: Phosphate-rock processing and phosphate fertilizer manufacture can release silicon tetrafluoride, SiF4, along with other fluoride…
Correct answer: SiF4- A. Zn,Mo,Mg,Ag
- B. P,Mn,B,Mg
- C. N,K,Mo
- D. Pb, Hg, Cr, Cd
Explanation: Lead, mercury, chromium and cadmium are toxic heavy metals that persist and can bioaccumulate in aquatic food chains.
Correct answer: Pb, Hg, Cr, Cd- A. DNA
- B. Cell membranes
- C. Mitochondria and ribosomes
- D. Nucleus
Explanation: Ionising radiation is most damaging when it breaks or chemically alters DNA, causing mutations, chromosome damage or cell death.
Correct answer: DNA- A. SO2
- B. CO
- C. CO2
- D. NO2
Explanation: Carbon monoxide causes anoxia-like oxygen deprivation by binding haemoglobin much more strongly than oxygen, forming carboxyhaemoglobin.
Correct answer: CO- A. London
- B. Paris
- C. Stockholm
- D. Tokyo
Explanation: The first major international conference focused on global environmental problems was the 1972 United Nations Conference on the Human…
Correct answer: Stockholm- A. Sewage
- B. Plastic
- C. Polythene
- D. DDT
Explanation: Sewage contains organic matter that microorganisms can decompose, so it is a biodegradable pollutant.
Correct answer: Sewage- A. Smoke filters
- B. Ringelmann's charts
- C. Horizontal microscopes
- D. All of these
Explanation: Ringelmann's charts compare the apparent darkness or opacity of smoke with standardized shades, allowing smoke density to be estimated…
Correct answer: Ringelmann's charts