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

Oogenesis, - Oogenesis involves the formation of haploid cells from an orig...

- Oogenesis involves the formation of haploid cells from an original diploid cell, called a primary oocyte, through meiosis. - The female ovaries contain the primary oocyte. The

Define the role of immunoglobin e in food allergy, Define the role of Immun...

Define the role of Immunoglobin E in Food Allergy? Immunoglobin E (IgE) helps to eliminate parasites (helminthes) and is responsible for classic allergic reactions commonly ref

Biochemical changes, Biochemical Changes Many workers have tried to fo...

Biochemical Changes Many workers have tried to follow the biochemical changes that precede flowering and result in meristems which give rise to flowers instead of vegetative s

Which part of heart serves as an effector, Which of the following serves as...

Which of the following serves as an effector, or as part of an effector, that functions in a negative feedback system? A. Nicotinic Acetylcholine Receptors (nAChR) in SA node c

Explain about coping mechanism, Q. Explain about Coping mechanism? Copi...

Q. Explain about Coping mechanism? Coping mechanism is defined as the skill used to reduce stress. In other words, these are consciously used skills. Overuse of coping mecha

What is the name of the larval stage of polychaetes, Q. Is the embryonic de...

Q. Is the embryonic development in earthworms indirect or direct? The embryonic development is direct because in earthworms there is no larval stage. Q. What is the name of

Bacterial diseases- black quarter, Black quarter Synonym: BlacklegBlack...

Black quarter Synonym: BlacklegBlack-quarter (BQ) is an acute infection but a non-contagious disease characterized by inflammation of skeletal and cardiac muscles, severe toxae

Pulmonary valvotomy with infundibular resection, Pulmonary Valvotomy with I...

Pulmonary Valvotomy with Infundibular Resection :  Infundibular obstruction in cases of pulmonary valvar stenosis could be primary or secondary. 11' this obstruction is signi

A -helix protein structure, a - HELIX In this intra molecular h...

a - HELIX In this intra molecular hydrogen bonds are present The polypeptide chain is spirally coiled, generally in a clock-wise or right handed fashion. Glycine

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