Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Lens Regeneration in Amphibians
It is an amazing fact that between all vertebrates only certain amphibians have the unique ability to regenerate lens, iris and retina in adult lire. The amphibians also change in their capability to regenerate a lens and in the source of cells from which a new lens is formed. Members of sub-order salamandridae (salamander, Triturus) have the significant ability of growing a new lens from the dorsal iris epithelium (neural ectoderm).
This is a unique instance of metaplasia, as the regenerating iris is derived from neural ectoderm and may be regarded as an extension of the brain whereas the original lens is derived from the epidermal ectoderm. This kind of regeneration has demonstrated that even adult differentiated cells can keep their potential to produce other cell types. In the larvae of the South African frog. Xenopus laevis an invagination of corneal epithelium gives increment to a ball of cells which transforms into the new lens. The procedure of the new lens regeneration in X. laevis more closely duplicates the embryonic process, like both the first lens and the regenerate lens develop from cells of epidermal ectodermal origin, though, even so it is a case of metaplasia, since differentiated cells of corneal epithelium give rise to lens cells that are morphologically and biochemically very different from those of the corneal epithelium. The regenerating capability in this anuran however species disappears at metamorphosis.
Types of Parthenocarpy Three types of Parthenocarpy are generally recognized: Genetical Environmental, Chemically-induced. Genetical Parthe
Water has key participation in organic reactions. What are examples of two types of organic reactions in which water is respectively incorporated or liberated in the products of th
Define Nutrition and Sports - Physical Fitness of an athlete? The physical fitness and performance of an athlete is affected by both current and previous nutritional status. T
Explain the Quebec Colony Counter? It is used for counting the number of colonies in a plate. Culture plate is kept on the screen which is illuminated from beneath. Counting is
NAILS - Cover terminal segment of fingers & toes. Highly vascular dermis under lying the nail is called nail bed . It gives pinkish colour to nail. The small part
Define the functional properties of hydrocolloids The hydrocolloids not only have the functional properties but also have nutritional characteristics. Most polysaccharide gums
Why does the recombination frequency of genes vary with the distance between them in the chromosome? The farther the distance among the loci of two genes in a chromosome the h
How are roots affected by water? Grow some seedlings in single end of a glass dish or pan. When they are about 5 cm tall start watering them on one side only and a little dista
write breif notes on oogenesis
#question.which annelids shws bioluminescence .
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd