Describe on Phylum Hemichordata
Phylum Hemichordata was earlier considered as a sub-phylum under phylum Chordata. But now it is placed as a separate phylum under non-chordata. This phylum consists of…
Biology
What do you mean by Fluid Mosaic Model of Plasma Membrane?
In 1972 S.J. Singer and G.L Nicolson introduced and explained a model of plasma membrane, called Fluid Mosaic model. This Fluid Mosaic model is still…
Differences between Plant Cell and Animal Cell
Differences between a plant cell and an animal cell: Plant cell 1) The plant cell is usually, surrounded by a cell wall which is composed…
Describe on Phylum Echinodermata
Phylum Echinodermata animals have an endoskeleton of calcareous ossifies and hence, the name Echinodermata (Spiny bodied, Figure). All are marine with organ-system level of organization.…
Describe on Phylum Mollusca
Phylum Mollusca is the second largest animal phylum (Figure). Molluscs are terrestrial or aquatic (marine or fresh water) having an organ-system level of organization. They…
Describe on Phylum Arthropoda
Phylum Arthropoda is the largest phylum of Animalia which includes insects. Over two-thirds of all named species on earth are arthropods (Figure). They have organ-system…
Describe on Phylum Annelida
Phylum Annelida may be aquatic (marine and fresh water) or terrestrial: free-living, and sometimes parasitic. They exhibit the organ-system level of body organization and bilateral…
Describe on Phylum Aschelminthes
The body of the Aschelminthes is circular in cross-section, hence, the name roundworms (Figure). It can be free-living or parasitic. They may be free-living, aquatic…
Definitions of Eukaryotic Cell
Eukaryotic cell: The type of cells which have well-organized nucleus and undergo mitosis division are known as Eukaryotic cells. Example: The cells of different algae,…
Characteristics of a Plant Cell
The characteristics of a plant cell: (i) The cell wall is made of cellulose or chitin. (ii) A distinct nucleus is present which is surrounded…
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