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.
Submerged implants Decision has to be made between two techniques. These techniques are: Technique 1: Stage two using a mucoperiosteal flap Technique 2: Stage two done wi
A population has 350 births per 1000 individuals and 320 deaths per 1000 individuals. 1. what its population growth rate? 2. Intrinsic rate of increase? 3. Doubling time? 4. Derive
Define Functions of Copper? Copper serves as a co-factor, as well as, an allosteric component of enzymes. In many enzymes copper functions as an intermediate in electrno transf
Explain acylglycerols The most abundant class of food lipids is the acylglycerols, also known as glycerol esters of fatty acids, which dominate the composition of depot fats in
What are some industrial processes that use bacteria? Bacteria are used by industry in many ways. There are vaccines made of attenuated pathogenic bacteria or of antigens prese
Do you know what the recommendations for fibre are? Well, the crude fibre intake should be 14 g/1000 Kcal. For adult woman 25 g/day and for adult man 38 g/day is desirable.
Define Flow Phase in Physiological Response to injury? It is characterized by hyper metabolism, increased cardiac output, increased urinary nitrogen losses, altered glucose met
What is the inactivation of the X chromosome? What is a Barr body? The Inactivation of the X chromosome is a phenomenon that occurs in women. Ever since women have two X chromo
Define the Osazone Test or Phenylhydrazine Reaction? Compounds with -CO-CHOH group form crystalline osazones with phenyl hydrazine. These osazones have characteristic shapes an
Explain about the Alzheimer's Disease? Named after the German neurologist who first described it, Alzheimer's disease is the most common cause of progressive dementia, due to t
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