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.
Cell Determination Cell determination is a process through which portions of embryonic genome are selected for expression in particular embryonic cells. Determination to follo
Q. How different are pteridophytes from bryophytes regarding substance transport? Pteridophytes are tracheophyte (vascular) plants that are they have tissues specialized in con
Q. Surgical Treatment of mitral stenosis? Available surgical treatment modalities include closed mitral valvotomy, open mitral valvotomy, and mitral valve replacement. With th
General process of post-hatching growth in insects While a young insect hatches out from an egg it is covered by a firm, inflexible, sclerotized cuticle, which because of its
Problem 1: "Structural Genomics aims at determination of the 3D structure of all proteins". Describe with techniques Show genomic techniques for determination of 3D struc
Define need of vitamin C during pregnancy period? Vitamin C deficiency has not been shown to affect the course or outcome of pregnancy in humans, although low plasma levels hav
Explain in brief about the neuropsychological test batteries Neuropsychological tests have the same standardisation requirements as all psychological tests. That is, there is t
Explain about the Microcolony DEFT? It allows determination of viable cells. Food homogenate is filtered through a DEFT membrane and then placed on the surface of appropriate c
Phylogenetic or Cladistic Classification Phylogeny plays a great role in classification. It is the appropriate theoretical background for taxonomy and is quite essential in exp
What is epistasis? What is the difference between dominant epistasis and recessive epistasis? The Epistasis is the gene interaction in which a gene (the epistatic gene) able to
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