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!
Class Polychaeta - Classification of Coelom
There are mainly marine forms with distinct head, having eyes and tentacles, segments have lateral projections of the body wall termed as parapodia which carry bundles of setae. These animals do not have clitellum. Sexes are separating (dioecious). They have no different or permanent sex organs, but their gonads consist of masses of developing gametes arising as swellings of Peritoneum. Eggs generally develop into trochophore larva. Many forms reproduce asexually by budding. ? Most of the polychaetes are 5-10 cm long. They live below rocks and in crevices, or burrow in mud. Some build tubes. Other is pelagic. These animals are generally divided into
(1) Errant forms on the one hand that are freely moving, pelagic, active burrowers, crawlers and the tube worms which leave their tubes for several purposes. On the other hand
(2) The sedentary forms do not leave their tubes or burrows but may generally expose just only their heads outside.
Errant polychaete structure may be considered classic of a generalised polychaete. The prostomium is very well developed, with several sense organs such as eyes, antennae, palps and the nuchal organs. Prostomium is dorsal and preoral projecting over the mouth. The peristomium that is the first segment carries the mouth. The predatory forms have jaws in the mouth. The peristomium is often fused along with one or more subsequent segments forming the head. These segments as well usually carry sensory structures, but their parapodium as well bears bundles of chitinous setae in the setal sacs. Nereis is a typical example. A cross section of its body by one of its middle segments shows well its internal organisation.
Explain the Hydrophobic Grid Membrane Filter (HGMF)? It is also used to enumerate microorganisms from a variety of food samples. By using this method, organisms as few as 10 ce
Define the term - lateralisation and localisation Discriminative validity studies including lateralisation and localisation achieved satisfactory results, but the localisation
Pyruvate carboxylase is a mitochondrial matrix enzyme whereas the other enzymes of gluconeogenesis are situated outside the mitochondrion. Thus oxaloacetate are produced by p
The Term "Green House" effect was first introduced by j. Fourier in 1827. The green house effects are the rise in temperature of earth because certain gases in the atmosphere (CO2,
Q. Why we use Histamine in consciousness? Histamine is involved in controlling the level of consciousness during waking. The level of histamine diminishes during sleep and its
The involuntary muscle movement is also genetical sk question #Minimum 100 words accepted#
In the human body, the potassium ion can pass easily through cell membranes, yet the potassium ion concentration is higher inside many cells than it is outside these cells. Could t
Q. Show Imbalances of basal nuclei? BASAL NUCLEI - Gray matter "islands" located deep within cerebral white matter. These nuclei process a variety of descending motor informat
Photometer Photometer (Figure shown below) measures the intensity of light. The metallic plate A is a photocell which emits electrons from its surface when light of sufficient
Q. What is the role of the ozone layer for living beings? The Ozone, O3, is a gas of the atmosphere that filters ultraviolet radiation from the sun disallowing most of that rad
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