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!
Cleavage and Gastrulation
Eventually, one spermatozoon fuses with the ovum to r restore the diploid genomic condition and activates all the potentials in the fertilized egg cell or zygote to develop into a new individual of the next generation. But the zygote is one cell and the adult body in the Metazoa is constituted of many cells - from a few hundred to many billions of cells. It implies that the unicellular zygote must enter the phase of rapid divisions in quick succession to convert itself into a multicellular body.
Such a series of divisions of the zygote is known as cleavage or segmentation. In this multicellular structure formed as a result of cleavage the various cells or cell groups later become rearranged as layers and sub layers during a process called gastrulation. Cleavage and gastrulation are significant phases in the ontogenetic development because cleavage transforms the unicellular zygote into a multicellular body and gastrulation lays the foundation of primary organ rudiments so as to initiate the formation of organs according to the body plan of the particular metazoan group of animals to which the particular individual belongs.
main external morphological feature that differentiates platyhelminthes from nematodes
Describe the result of Pulmonary Embolism? Results : The mortality in different series is reported between 3 and 36 per cent. In haemodynamically unstable patients this coul
method of digestion in porifera
Q. What are the differences between anastral and astral mitosis? Astral mitosis is that in which there is formation of the aster a structure made by the centrioles. Anastral mi
Pituitary The pituitary is also known as hypophysis. It is composed of two embryologically distinct tissue. The anterior pituitary or adenohypophysis is derived from the roof
some infomations about reproduction
Movement Movement is another characteristic of living things. It does not always mean locomotion or movement from one place to another. In animals movement is quite obvious. W
Q. Show the Natural selection of taxonomist? Natural selection associated with successful reproduction maintains a basic similarity of the reproductive feature of flowers, frui
The following series of nucleotide bases forms part of a DNA molecule: T A C T T A T G A C A C A G G A G G A C T a) Convert this string of bases that would be found on the corresp
Define about the Spectral Techniques - Colorimetry? Many determinations in the biochemistry laboratory are based on measurements of radiant energy emitted, transmitted, absorbe
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