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!
Tetrasporic Embryo Sacs
In this group neither of the meiotic divisions is accompanied by wall formation so that at the end of meiosis all the four haploid nuclei remain in a common cytoplasm forming what is termed a coenomegaspore. A tetrasporic embryo sac is more heterogeneous than a bisporic embryo sac because the four products of meiosis involved in its formation are genetically different. The nuclear behavior in tetrasporic embryo sacs is quite variable. The arrangement of the four nuclei in the coenomegaspore before the beginning of post-meiotic mitosis is of three types:
(A) 2+2 arrangement; two nuclei at the micropylar ad and two of the chalazal end
(B) 1+1+1+1 arrangement; one nucleus at the micropylar end, one at the chalazal end, and two placed laterally, one in each side, and
(C) 1+3 arrangement; one nucleus at the micropylar end and three at the chalazal end. Depending on whether nuclear fusion occurs or not, the number of the post-meiotic mitosis in the coenomegaspore and final organisation of the embryo sac, tetrasporic embryo sacs are of many types.
Describe the Neuropsychological Assessment of Infants Neuropsychological Assessment of Infants and Young Children followed by the developmental Concepts Unique to Infants and
what is the differences between spherical symmetry and radial symmetry
Asexual Reproduction - Its Prevalence and Significance Having studied the several aspects of asexual reproduction in the non-chordates we can now make a few generalizations.
Alkaline slant - Observation for Carbohydrate Utilization Pattern Test Alkaline slant (red) and acid butt (yellow) with or without gas production - This indicates fermentation
Q. Explain Spoilage of pasteurized milk? You would recall that pasteurization is one of the techniques to control and destroy the pathogenic, as well as, .spoilage bacteria i
How different are oxyhemoglobin and hemoglobin? Where is it expected to find a higher concentration of oxyhemoglobin, in peripheral tissues or in the lungs? Oxygen-bound hemogl
How mechanical soft diet is a normal diet The mechanical soft diet is a normal diet that is modified only in texture for ease of mastication. This is used when a patient canno
Describe Class Aves in details? Class Aves: The fossil record contains evidence that birds evolved from the reptiles. Birds share anatomical features with Protoavis and Archa
Q. What are the main types of cancer that affect humans? An Excluding skin cancer, that are the more easily detected and so cases are registered in larger number, the main type
Q. Explain nutritional management of metabolic diseases? The nutritional management of metabolic diseases such as gout and a few inborn errors of metabolism such as phenylketon
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