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!
Limb Field
By several marking and transplantation methods it is feasible to identify in early embryos the specific areas of groups of cells that ultimately make different organs. Identification of such types of areas helps to construct fate maps of dissimilar parts of embryos at different developmental stages. By using identical methods it has been possible to identify the presumptive areas of forelimbs and hindlimbs and localize exactly in the early embryos of several vertebrates. The prospective forelimb area in the tail bud stage embryo of the salamander, Ambystoma maculatum (Amphibia) is displayed in Figure. It is a circular disc-like area just behind the gill area containing ectoderm underlain by lateral plate mesoderm. The limb is actually made from cells in the central part of this disc and those surrounding this central part provide rise to peribranchial tissue and the shoulder girdle.
Figure: Prospective forelimb bud of Ambystoma a salamander. The central area contain those cells which are destined to form the free limb; the cells surrounding free limb are those which give rise to the peribranchial flank tissue and the shoulder girdle. The cells outside these regions usually are not included in limbs but can regulate to form a limb if more central tissues are removed.
Explain the Protein Energy Malnutrition (PEM)? Protein Energy Malnutrition (PEM) is the deficiency of macronutrients or energy and protein in the diet and forms the most import
Define Evolution of virulence? Diseases like cholera emerge as sudden outbreaks, showing marked variation via space and time both in their incidence--the number of individuals
Chlorophyll is the pigment in the green plants which absorbs solar energy. chlorophyll a - It is a green photosynthetic pigment common to all the photosynthetic organisms.
Define about Calcium and Osteoporosis? Gain in bone mass occurs throughout childhood; however, during adolescent growth spurt, the gain in bone mass, as well as, calcium retent
HIS T O R Y - Protoplasm was first seen by Corti, 1772 F . Dujardin called it "Sarcode" & observed it in animal cell Term "Protoplasm" was given by J.E. Pu
Q. What are venous vessels, venules and veins? Venous vessels are every blood vessel that carries blood from the tissues to the Venules, Veins and heart are venous vessels. Ven
What is folic acid? Why is the anemia caused by deficiency of folic acid known as megaloblastic anemia? The folic acid (when ionized it is known as folate) is a coenzyme that
Bone Cells Bone cells may be divided into two broad classifications depending on whether they make bone or resorb it. Osteoblasts make bone, while Osteoclasts resorb or take aw
In many countries of Asia biomass contributes l argely as a source of primary energy. People in rural areas at the peripheries of forests, continue to collect fuel wood from adjace
Q. What is the metagenesis? What are the other names of this procedure? Metagenesis is thekind of life cycle in which there are two different forms of individuals of the same s
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