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FPSC MCQs

Federal Public Service Commission — Complete MCQ Bank

1,461 Questions
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FPSC recruitment tests assess subject knowledge, general ability and job-related competence for federal government positions across Pakistan.

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141
Biology Medium

What is the term for a community of organisms interacting with their physical environment?

  • ABiome
  • BPopulation
  • CEcosystem
  • DCommunity
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Correct Answer: Option C — Ecosystem
Explanation: An ecosystem is a biological community of interacting organisms together with the physical environment in which they live including both biotic living and abiotic non-living components.
Submitted by: PaperMCQs
142
Biology Medium

What is the term for all the populations of different species living and interacting in the same area?

  • ACommunity
  • BPopulation
  • CBiosphere
  • DEcosystem
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Correct Answer: Option A — Community
Explanation: A community is an assemblage of populations of different species that live and interact in the same geographical area at a given time sharing resources and affecting each other.
Submitted by: PaperMCQs
143
Biology Medium

What is the term for all the organisms of the same species living in the same area at the same time?

  • ACommunity
  • BEcosystem
  • CPopulation
  • DBiome
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Correct Answer: Option C — Population
Explanation: A population is a group of individuals of the same species living in the same area at the same time who can interbreed and share genetic resources.
Submitted by: PaperMCQs
144
Biology Medium

What is the term for an interconnected network of food chains in an ecosystem?

  • APyramid of biomass
  • BTrophic level
  • CFood web
  • DFood chain
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Correct Answer: Option C — Food web
Explanation: A food web is a complex network of interconnected food chains in an ecosystem representing the multiple feeding relationships and energy pathways between organisms.
Submitted by: PaperMCQs
145
Biology Easy

What is the term for the sequence of feeding relationships in an ecosystem?

  • APyramid of numbers
  • BEcological niche
  • CTrophic level
  • DFood chain
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Correct Answer: Option D — Food chain
Explanation: A food chain is a linear sequence showing how energy and nutrients are transferred from one organism to another through feeding relationships starting from producers.
Submitted by: PaperMCQs
146
Biology Medium

Which type of nutrition involves organisms that feed on dead and decaying organic matter?

  • ASaprotrophic
  • BAutotrophic
  • CHolozoic
  • DParasitic
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Correct Answer: Option A — Saprotrophic
Explanation: Saprotrophic nutrition involves organisms such as fungi and bacteria secreting digestive enzymes onto dead organic matter and absorbing the digested nutrients playing a key role in decomposition.
Submitted by: PaperMCQs
147
Biology Medium

What is the term for the growth of plant roots downward in response to gravity?

  • APhototropism
  • BGeotropism
  • CHydrotropism
  • DThigmotropism
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Correct Answer: Option B — Geotropism
Explanation: Geotropism is the directional growth response of plant roots toward the pull of gravity ensuring they penetrate the soil to anchor the plant and absorb water and nutrients.
Submitted by: PaperMCQs
148
Biology Medium

What is the term for the bending of a plant toward light called?

  • AGeotropism
  • BPhototropism
  • CHydrotropism
  • DThigmotropism
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Correct Answer: Option B — Phototropism
Explanation: Phototropism is the growth response of a plant toward a light source caused by unequal distribution of auxin making cells on the shaded side elongate more than those on the lit side.
Submitted by: PaperMCQs
149
Biology Medium

Which type of tissue in plants transports dissolved food from leaves to other parts?

  • APhloem
  • BCambium
  • CXylem
  • DEpidermis
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Correct Answer: Option A — Phloem
Explanation: Phloem is the vascular tissue in plants responsible for transporting dissolved sugars and other organic compounds produced during photosynthesis from leaves to all parts of the plant.
Submitted by: PaperMCQs
150
Biology Medium

Which type of tissue in plants transports water and minerals from roots to leaves?

  • APhloem
  • BCambium
  • CEpidermis
  • DXylem
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Correct Answer: Option D — Xylem
Explanation: Xylem is the vascular tissue in plants that transports water and dissolved minerals from the roots upward through the stem to the leaves through a process driven by transpiration.
Submitted by: PaperMCQs
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