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.
Describe in brief about Pseudoisoehromatic Plates test Commonly known as Ishihara's plates, these reveal one pattern to the normal eye and another to the colour deficient. Colo
Define the Acute Phase of spinal trauma Disease? Nutritional support should start within 3-5 days or as early as possible to prevent the onset of malnutrition and secondary il
Which of the following is true for SA node cardiac muscle cells? A. An increase in the binding of norepinephrine to beta-adrenergic receptors in SA node cells will lead to an i
general character and classification of platyhelminthes
Explain Balanus The realised niche of Balanus is the same as its fundamental niche Lower limits: as for fundamental niche. Upper limits: as for fundamental niche
What is the excitation threshold of a neuron? How does this threshold relate to the "all-or-nothing" rule of the neural transmission? The excitation threshold of a neuron is th
How do taenias obtain food and make gas exchange? Tapeworms have hooks and sucking structures on their heads (scolex) that fixate the parasite in the gut wall; these structures
Organism:- Yeast Advantages Large size, hence separation from the culture medium is easy. As the pH of the growth is towards acidic side, high amount of lysine is prod
What two biotic factors could affect an antelope living in the Serengeti? The biotic factors that may affect an antelope living in the Serengeti could be:predation by carnivore
Q. Explain about Gastro Oesophageal Reflux Disease? GERD refers to the regurgitation of acidic stomach contents into the oesophagus. It results in a spectrum of clinical manife
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