Population Test

Population

This is online test 04 for CBSE class 12 Biology Organisms and Populations (Population).. There are 10 questions in this test with each question having around four answer choices.

Questions & Answers

1
Studies had revealed that human population growth curve is:
  • A
    none of these
  • B
    J-shaped
  • C
    U-shaped
  • D
    S-shaped
    Correct
2
Interdependence of mother and infant signifies:
  • A
    protocooperation
  • B
    commensalism
  • C
    symbiosis
    Correct
  • D
    scavenging
3
All of the following do not harm their host except:
  • A
    Pilot fish
  • B
    orchids
  • C
    Balanus
  • D
    Pediculus
    Correct
4
Interaction between Anabaena and Azollais of :
  • A
    parasitism
  • B
    amensalism
  • C
    mutualism
    Correct
  • D
    commensalism
5
Penicillin and streptomycin are responsible for:
  • A
    neutral interactions
  • B
    beneficial interactions
  • C
    positive interactions
  • D
    negative interactions
    Correct
6
Actual birth rate under environmental conditions is much less and is thus also called:
  • A
    Realisednatality
    Correct
  • B
    vital index
  • C
    biotic potential
  • D
    potential natality
7
J-shaped growth curve is characteristic of :
  • A
    primates
  • B
    yeast cells grown under lab conditions
  • C
    small population of reindeer experimentally reared in natural environment
    Correct
  • D
    human beings
8
Adamsiaand Eupagurusrepresent an example of:
  • A
    Commensalism
  • B
    mutualism
    Correct
  • C
    parasitism
  • D
    competition
9
Assertion: The group of individuals living in as defined geographical area share or compete for similar resources and potentially interbreed forms a population. Reason: only asexually reproducing organisms forms a population.
  • A
    Both assertion and reason are incorrect.
  • B
    Both assertion and reason are correct.
  • C
    Assertion is correct but reason is incorrect.
    Correct
  • D
    Assertion is incorrect but reason is correct.
10
Statement I: Age pyramid of expanding population is broader at base and thin upwards. Statement II: Number of individuals in pre-reproductive age is more than post reproductive age. Statement III: population size is technically called as population density.
  • A
    All statements are incorrect.
  • B
    All statements are correct.
    Correct
  • C
    Only statement II and III are correct.
  • D
    Only statement I and II are correct.