Physiology and biochemistry evidences, Biology

Assignment Help:

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.

Related Discussions:- Physiology and biochemistry evidences

What are the benefits of migration, What are the Benefits of migration ...

What are the Benefits of migration Eg: Need to leave Alaska due to harsh weather conditions (statement that birds are escaping NZ winter not acceptable). Longer day

Define nutritional requirements for extreme environments, Define Nutritiona...

Define Nutritional Requirements for Extreme Environments? Human beings have been able to survive and work under extreme environments of almost all regions of the earth, from po

Explain the microscope, Explain the Microscope? Microscope is a powerfu...

Explain the Microscope? Microscope is a powerful and crucial basic tool in the field of microbiology. Microbiology, as we have already studied in our theory Course, is the scie

Hazard, Hazards Is an event whether natural or man-made that has potential ...

Hazards Is an event whether natural or man-made that has potential for causing injury, loss of life and damage to the property or the environment. It can be grouped into two broad

Crown and bridge remover, Crown and bridge remover - Nash\Taylor tempo...

Crown and bridge remover - Nash\Taylor temporary crown remover -morell remover -position the curved tip below the height of contour or at the margin of the crown -Apply seve

Class Pisces, need different types of information about fishes and their pi...

need different types of information about fishes and their pictures

Sporophytic and gametophytic self-incompatibility, Sporophytic and Gametoph...

Sporophytic and Gametophytic Self-Incompatibility Besides the categories based on morphology, self incompatibility can be further classified into sporophytic or gametophytic t

Phosphate group, Shift of the phosphate group from carbon 3 to carbon 2 ...

Shift of the phosphate group from carbon 3 to carbon 2 Shift of thephosphate group form carbon 3 to carbon 2: This reversible reaction is  catalyzed by phosphoglycerate mutas

CYTON, WHAT DOES CYTON HAVE TO DO WITH NEURON

WHAT DOES CYTON HAVE TO DO WITH NEURON

What are the elements that form the middle ear, Q. What are the elements th...

Q. What are the elements that form the middle ear? What are the names of the three middle ear ossicles that participate in the phonosensitivity? The middle ear is formed by the

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd