Why were they called PROTOCTISTA?

CLASSIFICATION OF LIVING THINGS



2. KINGDOM PROTOCTISTA

This kingdom consist of three groups of organisms:- the protozoa, algae and the slime mould.

They are a diverse group with some formally classified in plant and animal kingdom.

CHARACTERISTICS OF PROTOCTISTA.

They are single celled or simple multicellular eukaryotic organisms.

Live in moist or aquatic environment.

They have heterotrophic nutrition and feed by ingesting food like animals.

They are microscopic in their size.

Move by pseudopodia (amoeba), cilia (paramecium) or flagella (Euglena)

Fig. Some protozoan

AMOEBA

Paramecium

Paramecium

ALGAE
Characteristics of Algae.
Single celled, conical or filamentous in form.
It poses chlorophyll and have autotropic nutrition.
Most of the algae are aquatic in habitat living in both fresh water and marine environment.
Their bodies are thallus i.e without differentiation into roots, stem or leaves.
They contain variety of pigments. i.e Brown, yellow, green, red, and are distinguished by those color pigments.
They reproduce asexually by fragmentaion, binary fission and spore formation in favorable weather i.e without xylem and phloem.
ECONOMIC IMPORTANCE OF ALGAE.
They are primary producers in the aqutic environment reponsible for producing food for other aquatic life like fish. And oxygen for their aerobic repiration.
Brown and red algae used by man as food.
They help in purification of sewage in sewage works.
HARMFUL ALGAE
They cause damage to water supply system by blocking pipes and clogging filters.
Algae blooms in polluted water bodies produce foul smell and render the water toxic and change its taste.
They cause damage to tea leaves by parasitic algae.
Check this as well
CLASSIFICATION- KINGDOM PROTOCTISTA


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