Life Sciences Mcqs


What is the effect on biodiversity when we move from pole to equator?

A) High B) Increases
C) Decreases D) Remains same
Answer & Explanation Answer: B) Increases

Explanation: Biodiversity varies with changes in altitude or latitude. It increases when we move from poles to equator. There is a decrease in biodiversity as we move from lower to the higher altitude, i.e., mountain.

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Which of the following term is given to the process of successful establishment of the species?

A) Ecesis B) Aggregation
C) Nudation D) Competition
Answer & Explanation Answer: A) Ecesis

Explanation: Ecesis is considered as the complete as it describes the adjustment of the species and its successful establishment in any new area.

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Who developed the polyclimax theory?

A) Daubenmire B) R.H Whittaker
C) Clement D) Tansley
Answer & Explanation Answer: D) Tansley

Explanation: Tansley developed the polyclimax theory which shows the mosaic vegetational climax controlled by soil moisture, nutrient and topography.

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Name the type of community which is maintained by the man or his domestic animals.

A) Climatic B) Edaphic
C) Disclimax D) Subclimax
Answer & Explanation Answer: C) Disclimax

Explanation: Disclimax community is the stable community which is maintained by a man and his domestic animals. It is also known as disturbance climax.

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Name the scientist who had described the term climax.

A) Linneus B) Clement
C) Puri D) Cowles
Answer & Explanation Answer: B) Clement

Explanation: Clement had given the term climax to describe the idealized endpoint of succession. The climax is the final community which cannot be replaced further.

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Which of the following factor is NOT responsible for autotrophic succession?

A) Climate B) Soil erosion
C) Man D) Microorganisms
Answer & Explanation Answer: D) Microorganisms

Explanation: The bare area in autotrophic succession develops by several factors like climatic, biotic, and topographic.

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Which of the following succession processes describes the development of bare area without any form of life?

A) Dispersed B) Clumped
C) Ecesis D) Nudation
Answer & Explanation Answer: D) Nudation

Explanation: Nudation is the first stage of succession where there is a development of the bare area by several external factors takes place.

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Name the succession in which development of the biotic community starts after the destruction of an existing community?

A) Climax B) Seral
C) Primary succession D) Secondary succession
Answer & Explanation Answer: D) Secondary succession

Explanation: Succession happens in a bare area where no community existed before is known as a primary, community and the succession which is followed by the destruction of primary community is called secondary succession.

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