Environment and ecology Questions with Solutions

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Environment and ecology:

A subject with rich and diversified content presents a huge problem to the non familiar candidates. For Environment and ecology, candidates are required to adopt a unique strategy like learning by section to section  By observing past trend of  Environment and ecology questions we have come up with good quality of Environment and ecology questions with solutions. Read carefully other available options besides solutions too . write us if you find any problem in Environment and ecology questions with solutions.

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Environment and ecology Practice questions-

 

Q-1. According to most conservation biologists, the single greatest threat to global biodiversity is-

(A) Insufficient recycling programs for nonrenewable resources.

(B) Global climate change resulting from a variety of human activities.

(C) Chemical pollution of water and air.

(D) Alteration or destruction of the physical habitat.

 

Q-2. Which of the following terms includes all of the others?

(A) Genetic diversity

(B) Species diversity

(C) Biodiversity

(D) Ecosystem diversity

 

Q-3. Which of the following levels of organization is arranged in the correct sequence from most to least inclusive?

(A) Ecosystem, community, population, individual

(B) Community, ecosystem, individual, population

(C) Population, ecosystem, individual, community

(D) Individual, community, population, ecosystem

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Q-4.  The greenhouse effect is

  1. Something that has only occurred for the last 50 years.
  2. a natural phenomenon that maintains Earth’s temperature range.
  3. the result of the differences in the angle of the sun’s rays.
  4. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere.

Select the Codes-

(A) a only

(b) b only

(c) a and b only

(d) a, c and d

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Q-5. Which of the following best explains why there are seldom more than five tropic levels in a food chain?

         1) Most carnivores function at more than one tropic level.

         2) Tropic levels above this number contain too many individuals.

         3) Top carnivores are too few in number to prey effectively.

         4) The ecosystem contains too much biomass.

        5) Energy is lost from each tropic level.         

Select the Codes-

(A) 1 only

(B) 5 only

(C) 1, 2 and 3

(D) 1, 2, 3, 4, 5

 

Q-6. Energy flow in ecosystem is

(A)Unidirectional

(B)Bidirectional

(C)Multidirectional

(D)None of the above

 

Q-7. Ecotype is a type of species in which environmentally induced  varitions are –

       1.Temporary

       2.Genetically fixed

       3.Genetically variable

       4.Highly mutable

Select the Codes-

(A) 1 only

(B) 1and 3 only

(C) 1, 2 and 3

(D) 2 only

 

Q-8. It has been a very harsh winter. The ground is covered in snow, and the trees are covered in ice. Many deer die because they cannot find food. This is an example of

  1. A producers providing food
  2. A limiting factor controlling a population
  3. A biosphere in trouble
  4. Predators harvesting the weak and the sick

Choose the correct codes-

(A) 1 only

(B) 2 only

(C) 1and 2 only

(D) 1, 2 and 4

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Q-9. In any ecosystem, the primary producers such as photosynthetic plants are the most abundant and predators such as tigers are the least abundant. The fundamental law responsible for this pattern is

(A) First law of thermodynamics

(B) Second law of thermodynamics

(C)Mendel’s laws of genetics

(D) Law of conservation of mass

 

Q-10.In spite of the prevalence of herbivores, the earth continues to be largely green because?

  1. The number of herbivore species is low.
  2. Herbivores are very inefficient feeders.
  3. Herbivore numbers are kept low by their predators.
  4. Herbivores promotes plant growth.

Choose the correct codes-

(A)1only

(B)1 and 2 only

(C)1, 2 and 3

(D)4 only

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Solutions to Environment and ecology questions –

  1. D
  2. C Explanation – biodiversity is the most inclusive of all.
  3. A Explanation –Individual is the basic unit of an ecosystem. A group of individuals belonging to same species forms population while a number of populations of different species forms community. Ecosystem is the most inclusive which is consists of many communities.
  4. B Explanation- when the long wave terrestrial radiation after ground heating is trapped in the atmosphere for some time before complete re-radiation it leads to heating of the atmosphere which is green house effect. This process is a natural phenomenon.
  5. B Explanation- according to second law of thermodynamics, energy is lost with each trophic level .
  6. A
  7. D
  8. B
  9. B
  10. D

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