Life Sciences MCQ

Test your knowledge with important Life Sciences MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Life Sciences MCQs at Bissoy

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

  High

  খ

  Increases

  গ

  Decreases

  ঘ

  Remains same
• Which of the following term is given to the process of successful establishment of the species?
  ক

  Ecesis

  খ

  Aggregation

  গ

  Nudation

  ঘ

  Competition
• Who developed the polyclimax theory?
  ক

  Daubenmire

  খ

  R.H Whittaker

  গ

  Clement

  ঘ

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

  Climatic

  খ

  Edaphic

  গ

  Disclimax

  ঘ

  Subclimax
• Name the scientist who had described the term climax.
  ক

  Linneus

  খ

  Clement

  গ

  Puri

  ঘ

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

  Climate

  খ

  Soil erosion

  গ

  Man

  ঘ

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

  Dispersed

  খ

  Clumped

  গ

  Ecesis

  ঘ

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

  Climax

  খ

  Seral

  গ

  Primary succession

  ঘ

  Secondary succession
• What is the entropy of the early succession community?
  ক

  Medium

  খ

  Low

  গ

  High

  ঘ

  Very high
• Which of the following selection pressure is obtained in late succession stage?
  ক

  K- selection

  খ

  R- selection

  গ

  E-selection

  ঘ

  L- selection
• Climax community is the end point of the succession
  ক

  True

  খ

  False
• On an ecological time scale, the process of directional change in community composition is known as ____________
  ক

  Keystone species

  খ

  Succession

  গ

  Guild

  ঘ

  Population
• Which of the following is a diversity index?
  ক

  Upright index

  খ

  Inverted index

  গ

  Bell shaped index

  ঘ

  Simpson’s index
• Name the term which defines the ability of community return to its original state after being displaced?
  ক

  Dispersed

  খ

  Clumped

  গ

  Resistance

  ঘ

  Resilience
• Which of the following is TRUE for the stabilized ecosystem?
  ক

  P-R=1

  খ

  P/R < 1

  গ

  P/R > 1

  ঘ

  P/R =1
• What is an edge effect?
  ক

  Community complexity

  খ

  Community classification

  গ

  Increased diversity at the boundary of ecotone

  ঘ

  Community stability
• Which of the following defines the separation of two different communities?
  ক

  Ecotone

  খ

  Edge effect

  গ

  Ecade

  ঘ

  Resistance
• Community refers to living and non-living components of the ecosystem.
  ক

  True

  খ

  False
• A group of people coexist within space and time and interact with each other is known as ____________
  ক

  Keystone species

  খ

  Community

  গ

  Guild

  ঘ

  Population
• Which of the following structure can be seen in the diminishing population?
  ক

  Upright

  খ

  Inverted

  গ

  Bell shaped

  ঘ

  Urn-shaped
• Name those organisms who can breed only once in their lifetime?
  ক

  Dispersed

  খ

  Clumped

  গ

  Iteroparous

  ঘ

  Semelparous
• Which of the following survivorship curve is suitable for the organisms who breeds several times during the course of their life span?
  ক

  Type IV

  খ

  Type III

  গ

  Type II

  ঘ

  Type I
• Which of the following term defines the ability of the individual in the population to produce new individuals?
  ক

  Dispersion

  খ

  Mortality

  গ

  Natality

  ঘ

  Population dispersal
• Name the term which defines the study of the characteristics and parameters of the population.
  ক

  Demography

  খ

  Population ecology

  গ

  Population density

  ঘ

  Mortality
• The size of the population is represented by the property called density.
  ক

  True

  খ

  False
• The collection of individuals which belongs to the same species when live together in a region is known as ____________
  ক

  Keystone species

  খ

  Community

  গ

  Guild

  ঘ

  Population
• Which of the following zone lies at the bottom of the sea?
  ক

  Littoral

  খ

  Benthic

  গ

  Neritic zone

  ঘ

  Pelagic zone
• Which of the following is inter-tidal zone between land and open sea?
  ক

  Benthic zone

  খ

  Pelagic zone

  গ

  Neritic zone

  ঘ

  Littoral
• Mark the one, which comes under a lotic ecosystem?
  ক

  Ocean

  খ

  Lake

  গ

  Pond

  ঘ

  River
• Which of the following ecosystem consists of forest, grassland and deserts?
  ক

  Artificial ecosystem

  খ

  Aquatic ecosystem

  গ

  Natural ecosystem

  ঘ

  Terrestrial ecosystem