Physiology and biochemistry evidences, Biology

PHYSIOLOGY AND BIOCHEMISTRY -

  • Ample and concrete evidence of organic evolution are obtained from the functional activity and chemical composition of animals.
  • J.B.S. Haldane (1937) stated that final theory of evolution will see it largely as a biochemical process.
  • Protoplasm - Protoplasm is a physical basis of life. Each cell is composed of a colloidal substance called protoplasm. The chemical composition of protoplasm is fundamentally similar in all animals.
  • Chromosome - Chromosomes are common to all living cells. They have the same chemical composition in all animals. Each chromosome is formed of proteins and nucleic acids. This is because of a common ancestry.
  • DNA - In all animals DNA functions 'as the genetic material. It is formed of many small units called nucleotides.
  • Each nucleotide has similar bases and attachment in all organisms.
  • Chimpanzees and humans share more than 97 percent of their genes.
  • Some genetic differences of vertebrates as estimated by DNA hybridization are as follows -

Organisms                                                % of difference in DNA sequences

Human/Chimpanzee                                                  1.6

Human/Gibbon                                                         3.6

Human/Rhesus monkey                                              5.5

  • Thus it can be concluded that closest living relative of man is chimpanzee. It can be proved by antiserum test.
  • Enzymes - Enzymes are proteins of high molecular weight necessary for the digestion of food. Trypsin is a protein has the same structure and function form protozoa to man. Similar amylase splits starch and occurs from the sponge to man. The similarity of enzymes shows interrelationship between various animals.
  • Hormones - Hormones are chemical messengers secreted by the endocrine glands. Thyroxine secreted by vertebrates is similar in their structure and function. In frog it is essential for metamorphosis. Thyroxine deficiency in man can be treated with the thyroxine hormone of other animals.
Posted Date: 10/9/2012 12:43:40 AM | Location : United States







Related Discussions:- Physiology and biochemistry evidences, Assignment Help, Ask Question on Physiology and biochemistry evidences, Get Answer, Expert's Help, Physiology and biochemistry evidences Discussions

Write discussion on Physiology and biochemistry evidences
Your posts are moderated
Related Questions
Suppose you were breeding rabbits and wanted to design an experiment to see if a new type of food would help your rabbits have fluffier fur. How would you treat the rabbits in the

what are the sources of infection (human, animal and non-living reservoirs), the routes of transmission (way in which the infection spreads) and different ways in which micro-organ

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

how does the structure of epithelial tissue allows it to fulfil its function

Q. Concerning the presence of the nucleus what is the difference between bacterial and animal cells? Animal cells (cells of living beings of the kingdom Animalia) have an inte

Q. Of which cells is the nervous tissue constituted? How is the generic function of this tissue related to the characteristics of the main cell type that forms it? The nervous

The non-oxidative phase  generates  ribose precursors The non-oxidative phase of  the pathway,  including the following reactions, converts pentose-5-phosphate to other sugars.

What are the Techniques of rastelli operations ? After median sternotomy pericardial patch is harvested and then cardiopulmonary bypass instituted using aortic and bicaval cann

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Considering the nature of negative-feedback control and the function of the respiratory system, what effect do you predict that a decrease in CO2 in the internal environment would