Theory of embryology -recapitulation theory / biogenetic law, Biology

Assignment Help:

RECAPITULATION THEORY / BIOGENETIC LAW

It was proposed by Muller & Haeckel on the basis of Baer's law.

According to it, in the development of animal phylum characters are formed first & species characters are formed in the last.

Hackel proposed recapitulation theory & explained that 'ontogeny repeats phylogeny' i.e. ontogenic development of the animal repeats the evolutionary history of the animal.

"Ontogeny repeats Phylogeny" -

887_biogenetic law.png

Induction of metamorphosis started by thiourea


Related Discussions:- Theory of embryology -recapitulation theory / biogenetic law

Explain the carrying capacity in ecology, Explain the carrying capacity in ...

Explain the carrying capacity in ecology? Carrying Capacity :  We have seen that natural populations do not normally achieve the maximum intrinsic rate of natural increase, o

Determine the following term - amniote egg, Determine the following term - ...

Determine the following term - Amniote egg Eggs that shelter the developing embryo in a water-filled sac—the amnion. Characteristic of the amniote animals, which include reptil

Calculate the volume of blood plasma, If one determines the concentration o...

If one determines the concentration of cortisol in the blood plasma to be 10 ugrams/ml and that in a 24 hour period a person excretes 10 mgs of cortisol, calculate the volume of bl

Relapse and recurrence, Relapse of infective endocarditis usually occurs wi...

Relapse of infective endocarditis usually occurs within two months of the discontinuation of antimicrobial therapy. The relapse rate for patients with native-valve endocarditis cau

Explain metabolic changes during infection, Explain Metabolic changes durin...

Explain Metabolic changes during infection With  the rise  in body  temperature above normal (98.4 0 F or 37°C) due  to infection several metabolic changes occur  in  the body

Obesity a health hazard, Obesity a health hazard: The factors of obe...

Obesity a health hazard: The factors of obesity are complex. Obesity is due to over eating and excess of energy intake. The obese child when grows up will be a target

Define magnesium levels in erythrocytes and lymphocytes, Define Magnesium l...

Define Magnesium levels in erythrocytes and lymphocytes? Magnesium levels in erythrocytes and lymphocytes: These measures appear to provide a more accurate assessment of body M

Six kingdom worksheet, what protist changes shape constantly and flows arou...

what protist changes shape constantly and flows around its food to engulf it?

What is the expression of moisture content, What is the Expression of Moist...

What is the Expression of Moisture Content? Moisture content, you would realize, is expressed in one of two ways i.e dry weight basis (dwb) or wet weight bases (wwb). Moisture

Differentiate individual atoms true or false, What is the first step normal...

What is the first step normally taken when you look through the oculars? The nuclei of the cheek cells have been stained using a special dye so that they appear purple. What is 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