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!
Autotomy and Regeneration
Shedding of body parts in self-defense to avert the attention of the predator-enemy or in any other emergency is a type of autotomy (auto: self, tomy: cutting). The most familiar example of autotomy is a breaking off of the tail in the common house lizard between the chordates, but the phenomenon is far much more common among the non-chordates. You have already seen that this takes place is many echinoderms. The star fishes and brittle stars can cast off their arms that can regenerate into whole animals. An extremely interesting case of autotomy followed by regeneration is found in a polychaete annelid worm termed as Chaetopterus. It lives permanently inside a U-shaped parchment tube in the muddy bottom in shallow sea water. If the anterior end of this worm is pulled by a predator a constriction between 12th and 13th segments breaks the body into two pieces. The worm loses its head region to enemy whereas the remaining hind portion is left behind in the U- tube. This hind portion contains the gonads and regenerates the front part needed for normal feeding activity. Chaetopterus has been found to have a remarkable power of regenerating a complete worm from a single isolated body segment that is segment 14.
MODIFICATION OF MITOSIS 1 . CRYPTOMITOSIS OR PROMITOSIS : Primitive type of mitosis. In this mitosis nuclear membrane not disappear (remain intact throughout the div
Describe three ways that RNA differs from DNA. RNA is single stranded; DNA is double stranded all of the codons from the deletion point to the end of the transcript would be s
Electro magnetic radiation Light is one form of energy. The light rays consist of tiny particles called photons. The energy carried by photon is called quantum. Light
Tetanus This is an infectious, non-febrile disease of animals and man, and is characterised by spasmodic tetany and hyperaesthesia. The causative agent is Clostridium tetani,
What is Slime Molds in diversity of life? Acrasiomycota and Myxomycota are appropriately named slime molds. They are slimy! The other part of their name comes from the time whe
What are the positions of actin and myosin molecules in the sarcomere before and during the muscle contraction? Schematically actin filaments attached perpendicularly to both s
Aortic Valve Replacement with Replacement of Aortic Root : When there is aneurysm of ascending aorta with aortic regurgitation, aortic root replacement is done. This
Chief Complaint and Patient's Expectations It is extremely vital to know what the patient really wants. 1. The chief complaint should be recorded in patient's own words as f
Determine the Symptoms of Dehydration? The symptoms of dehydration are: Thirst Loss of appetite Decreased urination Impaired physical performance Nau
Respiratory Organs These are the organs regarded with the gaseous exchange, i.e., intake .of oxygen and output of carbon dioxide. They have generally greater rate of gas exch
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: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd