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.
Biostatics : This is the application of mathematics in living organisms. Biostatistics is a contraction of biology or statistics sometimes it is called as biometry or biometrics.
The biologicaI species concept claims that species consist of natural populations and that species are real and objective. They are not man-made subjective abstraction. According
What are blood stem cells? Stem cells are undifferentiated cells able to distinguish into other types of specialized cells. The stem cells of the bone marrow create the diff
Q. What are some prophylactic measures against ascariasis? The major prophylactic measures against ascariasis are: efficient washing of vegetables and other foods base sanitary
SED A TIV E HYPNOTICS - They depress the activity of CNS. Reduce excitement, give feeling of calm. Higher doses induces sleep. Sleep inducing drugs are also called
Types of Gonads The gonads of vertebrates can be classified into the following two types Mammalian type and Non-mammalian type. They differ from
Why is the skin on worms, the gills in fish, and the lungs in humans good epithelial surfaces for respiration?
Define Precautions for Quantitative Determination of Viable Microbes? 1. Dilution should be made carefully. 2. Use fresh sterile pipette for making each dilution. 3. Asep
middle man of the body
what is the Symptoms of VIBRIO PARAHAEMOLYTICUS Symptoms: A total of greater than one million organisms may cause disease. Symptoms of intoxication which range from mild to se
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