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!
Sterility in Angiosperms
Sterility in angiosperms may arise due to several causes. Either the anther may not be formed, or anthers are formed but meiosis may be abnormal.
A. In situations where anthers are not formed, they may take abortive forms and appear like petals or sepals. These conditions are referred to as petaloid and phyllody respectively. There are even cases where anther formation may be suppressed altogether. These cases of pollen sterility have premeiotic determination.
B. There are other examples in which anthers are produced but meiosis is abnormal resulting in the formation of non-viable pollen.
C. Sometimes normal pollen grains are formed but they are not released. This results from failure of anther dehiscence. Such a situation is also described by the term contabiscent anther.
D. Sometimes meiosis is normal but abortion can take place due to premature dissolution of callose. This can occur at any stage during microsporogenesis.
Describe the Applications of vitamin b1 The steadily increasing consumption of white flours (insufficiently ground and thus low in vitamin content) by large sections of the po
Oxaloacetate to Malate Oxaloacetate to Malate: Oxaloacetate cannot permeate mitochondria 1 membrane well and it must be transported across the membrane in the form of malate
Q. Define Hepatic Cholesterol Synthesis? This is a highly complex process beginning with acetyl CoA formed from fatty acid oxidation or from carbohydrate breakdown. The rate-de
Explain about the Effect of Nutrient and Drug Interaction? Medicines can treat and cure many health problems. Nevertheless, do you recall your doctor advising or recommending c
What is Burden of Rheumatic Heart Diseases? Although in the twenty-first century RHD has been eradicated in western countries, in India and other developing countries it contin
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Q. Show the Anatomical Evidence? Anatomy is the study of the structure, organisation and development of cells and tissues of plants and animals. For over a century taxonomists
Where does cartilage occur in a joint and what it its function? Cartilage might be found covering the surface of bones where they meet in a movable joint. Cartilage decreases f
Describe the process of Crassulacean acid metabolism. a) How is it advantageous to plants? b) Describe the major steps in Krebs cycle. Why is this cycle also called citric a
Explain brifly Ribosomes, Endoplasmic Reticulum, Golgi Apparatus ? Ribosomes, Endoplasmic Reticulum, Golgi Apparatus : The cytoplasm contains many ribosomes, which are sphe
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