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Tuesday, 16 June 2015

FSc Notes Biology Part 1 Chapter 7 The Kingdom Protista or Protoctista Definitions

FSc Notes Biology Part 1 Chapter 7 The Kingdom Protista or Protoctista Definitions


Apicomlexans:
Apicomlexans are a large group of parasitic protozoa some of them cause serious diseases in man like malaria.

Chitin:
Chitin is aminopolysaccharide. In this case, amide group combine with polysaccharides. It is present in cell wall of fungi and exoskeleton of arthropods. It is resistant to decay.

Coenocytes:
The multinucleated hyphae that lacks cross walls are called coenocytes.

Cutin:
Cutin is a wax. It forms waxy layer on leaves and reduce the loss of water by evaporation.

Diatoms:
The algae in which organism in covered by two overlapping shells are called diatoms. These are the largest producers of marine environment.

Food chain:
The relationship of organisms in which one organism eats and is being eaten by the other.

Monophyletic evolution:
The evolution from single ancestor is called monophyletic evolution.

Pellicle:
The bodies of certain protozoans like paramecium are covered by pellicle. Pellicle is composed of double membranous structure.

Polyphyletic evolution:
The evolution of a group of organisms from different ancestors is called polyphyletic evolution.

Protists:
The Protists are defined by exclusion it means that they have certain unique characteristics. So they cannot be placed in any other kingdom.

Thallus:
A body that cannot be differentiated into true roots, stems and leaves and lack xylem and phloem is called Thallus.

Written by: Asad Hussain.

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