Ecology
PRACTICE MCQ FOR BOARD AND MEDICAL ENTRANCE EXAMINATIONS
Questions
Methaemoglobin formation results in blue baby syndrome. This is due to
- excess of lead in drinking water
- excess of arsenic in drinking water
- deficiency of iron
- excess of nitrates in drinking water
The term ecosystem was given by
- Odum
- Karl Mobius
- Tansley
- Haeckel
The total amount of energy that plants assimilate by photosynthesis is called
- gross primary production
- net primary production
- biomass
- a pyramid of energy
The second trophic level in a freshwater lake is
- fishes
- snakes
- phytoplankton
- zooplankton
Select the statement which best explains mutualism.
- One partner is benefited.
- Both the partners are benefited.
- One partner benefited, other is not affected.
- One partner benefited, other is affected.
The relationship between cattle egret and grazing cattle shows
- Parasitism
- Predation
- Commensalism
- Mutualism
A secondary pollutant among the following is
- NO2
- SO2
- PAN
- NO
Which of the following is not an abiotic factor?
- Light
- Decomposer
- Temperature
- Water
Which of the following is a secondary consumer in a grazing food chain?
- Grass
- Grasshopper
- Lion
- Bird
The thickness of the ozone in a column of air from the ground to the top of the atmosphere is measured in terms of
- Centimeter
- Dobson unit
- Pascal
- Astronomical unit
Montreal protocol was signed at Montreal (Canada) in 1987 to controll the emission of
- green house gases
- acid rain causing substances
- ozone depleting substances
- polar ice cap melting substances
Which of the following is an example of E-wastes?
- Sewage wastes
- Irreparable computers
- Domestic waste
- Radioactive wastes
Who is known as father of ecology in India?
- MS Swaminathan
- Birbal Sanhi
- Ramdeo Misra
- HG Khorana
Which one is a renewable source of energy?
- Coal
- Nuclear fuel
- Minerals
- Ground water
Common detritivores in ecosystem are
- phytoplanktons and zooplankton
- fungus and bacteria
- algae and bryophytes
- plants and animals
Lichens are the best indicators of air pollution and are sensitive to
- radioactive fallout
- nitrogen oxides
- sulphur dioxide
- methane
Ecological succession is
- the changes in species over time
- the gradual process by which the species composition of a community changes
- the changes in a forest as the trees grow larger
- the process by which a species becomes abundant
Which of the following is not an in situ method of conservation?
- Sacred groves
- Sanctuary
- National park
- Zoo
Which of the following is not an invasive species?
- Rouwolfia
- Parthenium
- Lantana
- Eiccornea
Which of the following is known as lung of the planet?
- Eastern himalaya
- Western ghat
- Amazon forest
- Savannha
Which of the following is not a green house gas?
- N2O
- CO2
- O2
- Methane
Depletion of ozone layer is mainly due to
- CO2
- NO2
- CFC
- CH4
Minamata disease is due to
- cadmium poisoning
- mercury poisoning
- lead poisoning
- arsenic poisoning
Which of the following gases is associated with global warming?
- O2
- N2
- H2S
- CO2
Percentage of energy that can be stored by a herbivore after feeding green plants is
- 20%
- 15%
- 10%
- 40%