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.
Why does scientist think that RNA was the first genetic material?
Mixture of gasoline and air is used as fuel in internal combustion engine. It is highly compressed and then ignited. 1. The process involves four strokes : 2. The f
Determine the Basic Seven Food Groups - Nutritions? These basic seven food groups are: 1) Cereals and cereal products 2) Pulses (also meat and meat products) 3) Milk and m
Most proteins made by ribosomes on the RER (rough endoplasmic reticulum) are glycoproteins, which is they hold short chains of carbohydrates (oligosaccharides) covalently related t
Chronic Aortic Regurgitation : Several factors have to be taken into account before recommending surgery. These include severity of symptoms and LV function. With evidence o
Explain the Heart Rate Monitoring (HRM) Method? HRM is a method to measure the daily energy expenditure of free-living individuals, based on the relationship of heart rate and
Open Head Injuries Open head injuries are TBIs in which the skull is penetrated, as in gun shot or missile wounds, or in which fragment of bone penetrate the brain substance. O
What is the route of the ingested food from swallowing until the duodenum? Unless reaching the duodenum the food enters the mouth, passes the pharynx, goes down the esophagus a
Q. How in the respiratory chain do electrons from NADH2 and FADH2 passing through cytochromes liberate energy for the ATP synthesis? What is this ATP synthesis called? NADH2and
Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4
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