Monday, 3 September 2018

Phylum Protozoa: Classification and General characteristic

Phylum Protozoa: Classification and General characteristic

Classification of Protozoa:

Class 1 Rhizopoda

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Class 2 Mastigophora/ Flagellata

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Class 3 Sporozoa

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Class 4 Ciliata

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General Characteristics of phylum Protozoa


Wednesday, 13 June 2018

Systamatics..additional information4



Monday, 11 June 2018

Origin and evolution of life..additional information 3

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progenote life tree
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Latimeria (coelacanth) it is a living Fossil which watch taken off from the coast of South Africa on December 22, 1938 by some fishermen. fisherman could not identify it's so they brough the specimen to miss Courtenary latimer curator of the local museum. when she failed to identify it, and it sketch to Professor .J.L.B. Smith, an eminent ichthyologist of Rhodes University college at Grahams town. he recognised is surviving member of crossopterygii (subclass of class osteichthyes) and named it latimeria chalumnii, after the discoverer and locality. its Discovery is of special interest because it is believed that crossopterygains (fleshy finned fish) were the ancestors of the first amphibians. latimeria is believed to be the oldest amongest living fishes.
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latimeria(living fossils)
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wallace's line
weber line
The Ancon Sheep. in seth wright's farm in Massachusetts, America, a normal sheep gave birth Ram( male sheep) with very short and curved legs in 1791. by artificial breeding from this ram seth wright raised are different sheep called ancon sheep ( very short legs sheep). after several generations, this character suddenly disappeared.formation and disappearance of ancon sheep is good example of mutations (discontinuous variations).
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Ancon sheep
Mimicry. it is a kind of adaptation. the term mimicry was introduced introduce in biology by Bates 1862. it is defined as "the resemblance of one organism to another objects or to any natural object for the purpose of concealment, protection or for some other advantage. the organism which exhibit mimicry is called a mimic. ther organism or object which is mimicked or imitated is called a model.
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1.
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peripatus- Phylum Arthropoda
2.
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limulus - Phylum Arthropoda
3.
neopilina -phylum mollusca

4.
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latimeria - Bony fish
5.
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sphenodon- class reptilia
6.
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Sunday, 10 June 2018

understanding of life. Additional information 2

understanding of life.  Additional information 2
Homeostasis - the term was coined by Cannon 1932.
Ringer- developed the technique of keeping tissues and organs alive outside the body.
Natatiorial adaptation -aquatic adaptations like streamlined body fins or paddle like Limbs or webbed digits.
Fossorial adaptations -burrowing adaptations like strong shoulders forward four Limbs and special digging organ.
cursorial adaptations- adaptations for walking and running like elongation of limbs development of hooves( anguligrade,e.g.cattle) spreading of digits( digitigrade,e.g. dog) human beings and bipedal (on two Limbs) while most other animals are quadripeds( on four Limbs).
scansorial adaptations- they are adaptations for climbing like a day shift desk and recurved claws in wall lizard
volant adaptations- they are flight adaptations like body covering with feathers light and fused bones wings.
Adhesion it is sticking aur attachment to dissimilar part as water molecules to walls of treachery elements.
Cohesion- it is sticking together of similar part as water molecules amongst themselves in liquid state through hydrogen bonds.
chloride shift it is the phenomenon of passage of chloride ions from plasma into red blood corpuscles in return for the release of bicarbonate ions from red blood corpuscles.
Bioenergetics -it is the study of flow of energy into an organic system (e.g ecosystem, human beings) involving storage, transfer, transformation and dissipation.
Biodynamics- branch of science weather activities and bioenergetics of living beings.
Thermodynamics- branch of science that deals with relations between heat and other forms of energy. it has three laws.

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