Download App

Microbes in Human Welfare. — Bio Zoology STD 12 — Question

Tamilnadu BoardEnglish MediumSTD 12Bio ZoologyMicrobes in Human Welfare.2 Marks
Question
Expand and define BOD.
✓

Answer

  1. BOD – Biological Oxygen Demand (or) Biochemical Oxygen Demand
  2. BOD refers to the amount of the oxygen that would be consumed, if all the organic matter in one litre of water were oxidized by bacteria.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "[ 2 Marks Questions ]" from Microbes in Human Welfare.→Microbes in Human Welfare. — all question types→Bio Zoology STD 12 question papers→Tamilnadu Board STD 12 question papers→Tamilnadu Board question paper generator→

Similar questions

Name the connecting link for the following groups of organisms.
  1. Annelida and Arthropoda
  2. Reptiles and Aves
  3. Pisces and Amphibians
  4. Reptiles and Mammals
→
Define Attenuated recombinant vaccines.
→
Okazaki fragments are joined by the enzyme ________ during DNA replication.
→
What are the four ways through which the living organisms respond to abiotic factor?
→
Name the scientists who propounded the following theories.
  1. Mutation theory
  2. Chemical theory of evolution
→
Census refers to the official count or survey of population. Every 10 years our government undertake census. In India the next census will be carried out in 2021. Mention any four characters that are employed in human population census.
→
The immune system of a person is suppressed,. In ELISA test, the result is positive
  1. Name the disease associated with this.
  2. Why did he loose his immunity?
→
What are natural causes for biodiversity loss?
→
Classify air pollutants.
→
Define fossilization and mention its types.
→