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!
Origin and Evolution of Metazoa
Most of the early metazoans were soft bodied and so their fossils are rare. The extremely fragmented fossil record does not shed any specific light on their origin. Therefore, 'most of the explanations on their origin are based on their embryology and -comparative morphology. A series of theories have been put forward to explain the origin of multicellular metazoans from unicellular organisms. Of these, three principal theories could be considered.
1) Syncytial Theory: That the ancestral metazoans have arisen from a multinucleate. ciliate by compartmentalization or cellularization.
2) Colonial Theory: That the ancestral metazoans have arisen from colonial flagellates by cellular specialisation and interdependency.
3) Polyphyletic Theory: That the metazoans have arisen from more than one group of organisms.
Define effect of Protein deficiency during pregnancy period? The effects of protein deficiency during pregnancy are difficult to separate from the effects of caloric deficit, s
Digestion of fats A. Production of bile salts in the liver and the secretion of those bile salts into the small intestine. B. Production of lipase in the pancreas and
Q. Principles of Numerical Taxonomy? Numerical taxonomy is based on the following 7 principles. 1) The greater the content of information in the taxa of a classification is an
Discuss fatty acid with free radical The hydrogen is removed from the fatty acid chain to yield a free radical. The removal of hydrogen takes place at the carbon atom next to t
What are the principal sources of excessive nitrate and phosphate in rivers and lakes?
Explain about Mental foramen and nerve Mental foramen is a strategically important landmark during osteotomy procedures. Its location and the possibility that an anterior loop
Describe the Classification of Arthropoda? Most arthropods also go through a growth process called metamorphosis, whereby they change their bodies into an entirely different fo
What is Defense mechanism Defense mechanism relate to the body's ways to protect itself from any infection or a disease
Define Nutritional Management of Food Allergies and Food intolerance? In this unit we will be discussing the adverse reactions associated with food. You may have read or heard
Which type of defense cell do bacteria attract and cause to multiply during the inflammation process? What is the name given to the waste material produced by the inflammation trig
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