Five Kingdom Classification

Topics: Plant, Flowering plant, Bacteria Pages: 13 (2641 words) Published: March 12, 2013

Biological System of Classification
• Organisms are first divided into a few kingdoms
• Phylum or division is made up of several classes
• Classes are made up of orders
• Within each order there is a family
• Each family consists of a varying number of genus
• A genus usually has several species. Organisms within the species can breed

• Also called as bacteria, these as believed to be the most abundant organisms on earth • Many believed that they are the first forms of life on earth • Most of them are tiny. Smaller than human cells

• They always contain DNA
• Microbiology is the study of micro-organisms
Reproduction of Bacteria
• They reproduce by the use of binary fission in which a new cell is formed by the division of a mother cell Types of Bacteria
• Coccus – spherical, globular
• Baccilus – rod shaped
• Spirilum – corkscrew
• A bacteria is surrounded by a thick slime layer called capsule • The purpose of the capsule is to protect the bacteria from anything that can kill it Factors that affect growth of bacterias

• Enough food
• Moisture
• Darkness
Beneficial Bacteria
• The bacteria that is in our body is not called as bacteria, but is called as enzymes ➢ Amylase enzyme – digests carbohydrates (mouth) ➢ Pepsin enzyme – digests meat (stomach)

➢ Renin enzyme – digests dairy (stomach)
➢ Lipase enzyme – digests fats (stomach)

• There are more than 56000 species of this animal-like organism • They are heterotrophic and single celled eukaryotes (heterotrophics are living beings that can produce their own food) • Protozoans means one celled animals

• They usually group together and form colonies
• They are either free living or parasitic
• They are mostly microscopic
• They are believed to have existed 3.5 billion years from now Classification of Protozoans
• Class Sarcodina
• Class Ciliophora
• Class Zoomastigna or Mistigophora
• Class Sporozoa
• There are about 40000 species in this class
• They move and take in food by “pseudopodia” which means false feet • Pseudopodia are formed when the cell membrane extends through the internal flowing of the cytoplasm • They feed by phagocytosis which means the cell membrane engulfs or swallows prey or any food material inside the cell • They have an external shell or internal shell which gives them shape • AMOEBA is the most common example of this group

• Amoebas are freshwater organisms that lives in ponds • They are bottom-dwelling organisms that feed on decaying organic matter • They reproduce asexually by mitosis
• They move by short, hair-like feet called “cilia” • There are about 8000 species
• Salt or fresh water
• PARAMECIUM is the most popular cilia
• It has an oral groove, which serves as a mouth for sweeping food • Reproduction by binary fission
• Use whip-like flagella to move
• There are 2500 species
• They have no organs for locomotion
• All 6000 species are parasitic
• The genus plasmodium causes malaria
• Causes fever, anemia, chills, enlargement of liver and kidney failure • They are transferred by a mosquito called Anopheles
Plant-like Protists
• Algae
• Diatoms
• Dinoflagellates – it has 2 flagella, it glows in the dark Algae
• Plant-like protists
• They are autotrophic which means they can produce their own food • They can perform photosynthesis just like plants
• There are 3 kinds of structure for an algae:
➢ Colonial - independent cells that move and function as a unit ➢ Filamentous – cells that are arranged in a straight line. They stay at the bottom of the...
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