NCERT solution Class 8 microorganisms: friend and foe

NCERT Solutions

Class 8 Science

Microorganisms: Friend and Foe

NCERT Questions

Q.5

What are the major groups of microorganisms?

Microorganisms are classified into four major groups are bacteria, fungi, protozoa and some algae. They vary in size and mode of nutrition.

Bacteria-

Further divided into archaebacteria and eubacteria.
Archaebacteria-They are composed of a single cell and are called prokaryotes. Archaebacteria are only found in hot boiling water or other types of extreme environment.
Eubacteria- a bacterium of a large group typically having simple cells with rigid cell walls and often flagella for movement.

Fungi-

Heterotrophic multicellular organisms.
It includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms.
The mode of formation and shape of these spores is traditionally used to classify molds. Many of these spores are colored, making the fungus much more obvious to the human eye at this stage in its life-cycle

Protozoa-

Unicellular eukaryotic organisms.
They are often grouped in the kingdom Protista together with the plant-like algae and fungus-like water molds and slime molds.
Protozoa are dangerous parasites.

Algae-

Large, diverse group of photosynthetic organisms.
Any of numerous groups of chlorophyll-containing, mainly aquatic eukaryotic organisms ranging from microscopic single-celled forms to multicellular forms.
"Algae" covers many different organisms capable of producing oxygen through photosynthesis (the process of harvesting light energy from the sun to generate carbohydrates).

Video solution:

Microorganisms: Friend and Foe Class 8 Science NCERT Chapter 2 NCERT Solutions

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