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!
Nucellus - Ovule
Enclosed within the integuments lies a homogenous mass of tissue which is termed as the nucellus. This is the tissue in which the female gametophyte differentiates and develops. At an early stage of ovule development, usually an archesporial cell or a group of cells differentiate in the hypodermal region of the nucellus. The archesporial cell may function directly as the sporogenous cell. In such situations, the sporogenous cell also remains hypodermal in position and is surrounded by a single-layer of nucellus, in the micropylar region. Such ovules are known as tenuinucellate. These are commonly seen in Sympetalae.
Figure: Tenuinucellate ovule of Elytraria acaulis. In c and d integuments are not shown.
Floral Induction The transformation of vegetative apex into a floral apex is a multifactor and multistep phenomenon. Despite researches on flowering carried out during the las
What is the importance of mitosis for the embryonic development? Every embryo grows from a single cell that suffers mitosis and operates other cells that also divide themselves
What is ascaris? What is the disease caused by this worm? Ascaris, or Ascaris lumbricoides, is an animal of the nematode phylum, i.e., a roundworm. Ascaris causes ascariasis, a
In the offspring of a dihybrid self, what percentage of the individuals are themselves dihybrid?
Endocrine System The nervous system brings about integration and co-ordination of several activities of the animal. The afferent stimuli from several sense organs are brought
Phenology of Different Species The phenology of different species present in a community may differ from each other significantly. It is these phenological changes which give
Define Limitations of Agar Syringe or Agar Sausage Method? (i) It is applicable to surfaces with low contaminants. (ii) Problem of spreading colonies may occur. (iii) Col
Q. Why does not a long lasting vaccine against common cold exist yet? Viruses that present a high mutation rate like the virus that causes the common cold escape easily from th
Q. After the blastula stage what is the following stage of the embryonic development? What is the passage from blastula to the next stage called? The blastula turns into gastru
Adverse effects of Efavirenz The most common adverse effects have been rash, dizziness, headache, insomnia and inability to concentrate. Vivid dreams, nightmares and hallucinat
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