Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Two-Kingdom Classification
The history of taxonomy is as old as man himself. It may be traced back to prehistoric times because man had learnt to designate living organisms by specific names very early in his evolutionary history. Much before the advent of civilisation living things had been categorised into animals and plants. Hippocrates (460-370 BC), Aristotle (384-322 BC) and many others had tried to put some order into the chaos of the bewilderingly large number of different life forms. Aristotle appears to have been the first to attempt a logical system of classification. He classified animals on the basis of presence or absence of blood as Sanguineous (with blood) and Non-sanguineous (without blood). He believed that in evolution, life had been directed towards a perfect animal form, having blood (Table 1.6). He incorporated this idea which is a hierarchical system of classification In his book entitled 'Scala Naturae'. He also recognised two kingdoms in the living world i.e., Plantae and Animalia. The former included mainly immobile forms, while the latter embraced mobile forms. We also know that one of the major differences between the two is that the members of Kingdom Plantae are autotrophic and obtain their food mostly by photosynthetic means and those of Kingdom Animalia are heterotrophic and obtain their food by ingestion.
Table: Aristotle's 'Scale of life' or Scala Naturae.
Kingdom Plantae was later divided by biologists into two subkingdoms,
Kingdom Animalia, on the other hand, was divided into Subkingdoms Protozoa containing unicellular forms and Sub Kingdom Metazoa including sponges and other multicellular organisms. A third Sub Kingdom Parazoa was later created and the sponges were shifted to this Sub Kingdom due to their intermediate position. between uni and multicellular organisms.
Explain about the various Cooking methods? All of us eat food either raw or in cooked form. Have you ever thought why we need to cook food? Cooking is a primary process to mak
Genome is the whole compliment of genetic material in the form of the permanently maintained DNA for the particular given organism. Its size is usually given as its total number o
A solid compound was found to contain 42.11% C, 51.46%O and 6.43% H by weight. The molecular weight of the compound was 341. What is the molecular formula of the compound?
Compound feed prepration The compounding of animal feed involves processing and blending of raw feed ingredients of wide ranging physical, chemical and nutritional composition int
Q. Is reproduction in sponges asexual or sexual? Reproduction in sponges can be asexual by budding, fragmentation or gemmation (regeneration) or sexual with larval stage a cili
Directional or progressive selection is the mode of selection associated with environmental change. We said earlier that in an unchanging environment stabilising selection removes
Induction of hydrolases - Responses to Infection Plants do respond to attack by pathogens. To restrict their spread the cells synthesise and secrete enzymes to hydrolyse the c
what is the classification of the Gumbout Chiton?
Question 1 What is fixative? Discuss the characteristics of a good fixative. What is the importance of using a good fixative for tissue processing? Question 2 What is embe
Q. What is Tricuspid valve annuloplasty? It depends upon the cause of tricuspid regurgitation. Specific therapy is directed towards the particular cause of pulmonary artery hyp
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd