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Organisms and Populations

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Biology

Subject Chosen

Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Probiotics are

  • safe antibiotics

  • cancer inducing microbes

  • new kind of food allergens

  • live microbial food supplement


D.

live microbial food supplement

Probiotic is a microbial preparation that helps to establish a population of beneficial microorganisms in the body to maintain health and with the potential to prevent disease.

Probiotic is a microbial preparation that helps to establish a population of beneficial microorganisms in the body to maintain health and with the potential to prevent disease.

370 Views

The departure of a individual from a population is called :
  • Natality 
  • Mortality
  • Immigration 
  • Emigration

D.

Emigration
574 Views

Ants give information to their companions :
  • by dancing
  • by secretion of pheromones
  • by making sound
  • by defecating

B.

by secretion of pheromones
697 Views

Population density is denoted by the symbol
  • N
  • D
  • M
  • D

A.

N
738 Views

To live in groups is beneficial because :
  • feeling of security
  • can obtain food easily
  • Partner is available for mating
  • All the above

D.

All the above
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The number of births during a given period in the
population that are added to the initial density is 

 :
  • Natality
  • Mortality
  • Migration
  • Immigration

A.

Natality
587 Views