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!
Q. Show the value of embryology?
The value of embryology in solving taxonomic problems can be appreciated by studying some specific cases. Amongst the classical examples cited by embryologists is the taxonomic position of the genus Paeonia. In a majority of the classical systems of angiosperm classification, this genus is considered as a member of the family Ranunculaceae. However, several botanists have been recognising several characters of Paeonia which distinguish it from other members of the family Ranuncuiaccae. These include vascular and floral anatomy, basic chromosome number as well as-the size and morphology of the chromosomes. The most significant difference bitwee3 the genus Paeonia and other members of the family Ranunculaceae concerns several embryological characters and this study was carried out independently by Russian botanists Yakovlev and Yoffe as well as by the hdian botanist Prem Murgai. The most significant observation relates to' the embryogeny in Paeonia. Unlike other angiosperms, this genus exhibits a unique type of embryogeny.
According to the Russian botanists, the zygote nucleus undergoes repeated nuclear divisions forming a coenocytic structure. Later, the nuclei lodge themselves in a peripheral layer of the -cytoplasm, and this is followed by wall formation so that the peripheral region becomes cellular. Some of the peripheral cells then function as embryo initials but only one of these develops into an adult embryo. Murgai on the other hand observed a division of the zygote into a 2 celled proembryo and the basal cell of this proembryo develops into the coenocytic structure leading to the development of the adult embryo as described by the Russian botanists.
cellular respiration
how twins are produced and why
Q. What is the function of the left ventricle? Where does the blood go after leaving the left ventricle? The function of the left ventricle is to pump the blood under high pres
Q. What is the difference between cellular specific immune response and humoral specific immune response? Humoral specific immune response is the defense system by means of, an
Why Water is a essential nutrient for life? In this unit, we learnt that water in spite of being ignored, is an essential nutrient required for life. Though the content of tota
Q. Under which forms is the Trypanosoma cruzi found in its hosts? In the definitive hosts also as in triatomine bugs (intermediate hosts) the protozoan that causes Chagas' dise
Q. What is haemoglobin? What is the inorganic element that is basic of the composition of haemoglobin? Haemoglobin is the protein present in the blood responsible for the trans
Explain about the Dysphagia? Dysphagia is the inability to swallow or difficulty in swallowing. It is a common problem in those with neurological disorders and can occur in any
Advantages of Insulin Pen - More convenient and easier to transport than traditional vial and syringe. - More accurate doses. - Easier to use for those with visual or fin
Plants are supplied with adequate amount of phosphorus Phosphorus has also been associated with early maturity of crops particularly the cereals. Its shortage is accompanied by
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