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!
Operculum - Seed Appendages
The term operculum is applied to a plug-like structure formed in the micropylar portion of the seed by proliferation of cells at the tip of the inner integument or the nucellus. An operculum has been observed in seeds of many monocotyledonous families, such as the Commelinaceae, Musaceae, Lemnaceae and Zingiberaceae, and a few dicotyledonous families like Bignoniaceae and Nymphaeaceae.
In Lemna paucicostata, cells at the tip of the inner integument undergo a remarkable expansion after fertilization and form a dome-shaped, stopper- like operculum. Cells of the operculum are thick-walled and contain an orange-red substance. During germination of the embryo the operculum becomes detached from rest of the seed and facilitates emergence of the embryo.
how respiration takes place in mammls and reptiles
The chief water conducting elements of xylem in gymnosperms are: 1. Vessels 2. Fibres 3. Transfusion tissue 4. Tracheids Tracheids
The ability to sequence DNA has led to a revolution in molecular biology. a) Describe the principles of DNA sequencing. b) A single sequencing reaction yields at best 1500 ba
Q. What and how many are the pulmonary veins? The pulmonary veins are part of the pulmonary circulation they are vessels that carry oxygen-rich (arterial) blood from the lungs
Triacylglycerols, cholesterol and phospholipids are associatively insoluble in aqueous solution. Thus, they are transported around the body in the blood as parts of lipoproteins.
Define Sample Titration for Fehling Soxhlet Method Dilute the given sample glucose solution in 100 ml volumetric flask to the mark with distilled water. Pipette 5 ml of Fehling
Q. Balloon Aortic Valvuloplasty for aortic stenosis? This is the procedure of choice in children and young individuals where the valve is not calcified. In elderly patients wit
Why Body composition assessment is done in sports and exercise? Body composition assessment is generally done in sports and exercise for the following reasons: 1) It can ser
Ultrasonography: Ultrasounds are sound waves with a frequency of higher than the upper range of human hearing i.e., approximately 20,000 cycles per second (20 kilohertz).
classification
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