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!
Pollen Biology
Fluorescence microscopy coupled with biochemical analysis has helped resolve the differential activity of the enzyme, β-l, 3- glucanase that catalyses the dissolution of callose. The enzyme activity is relatively low during the first meiotic division but reaches its peak at the time of spore release. This sequence of events controlling the enzyme activity is important, as an early dissolution of callose may lead to sterility. Use of autoradiographic and fluorochromatic techniques demonstrated the reduced permeability of the callose wall and the resultant chemical isolation of microspores.
A combination of phase-contrast and fluorescence microscopy also revealed that the callose wall during exins formation serves as a mold or template. Factors that trigger the onset and regulation of meidsis in anther and ovule can be worked out by employing labeled reagents. Biochemical studies through isoenzyme markers have already demonstrated specific stages of meiotic process. There is an increase in the activity of acid phosphatase at zygotene, followed by subsequent decline. At pachytene, marked activation of endonucleases is recorded. Isoperoxidases serve as markers in normal pollen development in Mercurialis annua.
Maxillary Tuberosity Incision and reflection of the mucosa overlying the areas of the maxillary tuberosity and hamular notch when taking impressions for maxillary subperiosteal
Q. Why is it difficult to produce efficient vaccines against a viral infection like dengue and AIDS? It is difficult to make vaccines for dengue because there are four differen
Q. List the major chemical changes occurring in food? The major chemical changes occurring in food are lipid oxidation leading to rancidity, loss of vitamins and degradation
Reduction of stress on the implant - Removal of prosthesis when it is in the non aesthetic areas - Occlusal adjustment - Reducing Cantilever length - Occlusal splint
Define nutritional management of severe anorexia nervosa? The nutritional management of severe anorexia nervosa is therefore, considered in terms of three consecutive phases:
fax
a) What are the needsfor an organism to be an indicator organism? b) In Australia, National Parks and coastal beaches attract various visitors during holiday periods. EPA is
Metalimnion - Summer Stratification This zone lies below the epilimnion and above the hypolimnion and thus forms the intermediate layer which is non-circulating. The metalimni
Theory of Germplasm (i) 'August Weismann' (1889) suggested the theory of continuity of germplasm. (ii) He referred to the reproductive cells as germplasm and
Define effect of Protein on quality & quantity of human milk? Some studies show that the protein content of milk may be affected by chronic protein under nutrition. In some cas
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