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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" -
Induction of metamorphosis started by thiourea
What are analogies for a nucleolus? If the nucleolus is the president of a factory then the nucleolus is the manager
why obelia shows an intermediate grade of organisation
FUNDAMENTAL CHARACTERS OF EMBRYONIC DEVELOPMENT 1 . GAMETOGENESIS- Testes & ovaries are collectively called as gonads. Similarly sperms & ova are collectively calle
Q. Explain procedure of Aortic Valvuloplasty? BAV is usually performed by the retrograde transarterial approach. Often another catheter is placed in the LV through transseptal
How does parafunctional habits lead to implant failure Parafunctional habits like bruxism and clenching create mechanical and biological problems due to overloading and is cons
Explain about bimodal diurnal pattern Animals that show a bimodal diurnal pattern have their activity controlled by two biological clocks - one that controls the time of onset
Surgical Therapy The clinician may use a surgical approach when non-surgical therapies are not indicated or are unsuccessful. The surgical techniques are modified from those
Xenobiotic compounds are man-made chemicals that are present in the environment at unnaturally high concentrations. The xenobiotic compounds are either not produced naturally, o
economic importance of the phylum protozoa
Biological Responses Controlled by Phytochrome Phytochrome responses are those which are controlled reversibly by red and far-red light. These can be broadly categorised as:
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