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!
Gonial Apospory and Somatic Apospory
Gonial Apospory
There is no meiosis. The megaspore mother cell enlarges; a small vacuole appears above and below the nucleus. The cell thus becomes 1-nucleate embryo sac. Three successive mitotic divisions result into an 8-nucleate embryo sac. In Brachycome, the polar nuclei function directly as the first 2 endosperm nuclei.
Somatic Apospory
Meiosis is apparently normal but megaspores play no part in the embryo sac formation. Either during or soon after meiosis one or more sporophytic cells (nucellar or chalazal) enlarge and invade the nucellar lobe destroying and replacing the megaspore. After 3 successive nuclear divisions each such cell becomes differentiated into an aposporic 2n embryo sac with normal organization. Thus, gametophytic generation is completely eliminated.
MENDEL'S EXPERIMENTAL PLANT Mendel selected common garden pea ( Pisum sativum ) for his experiments, because:- (i) The pea is small and annual plant. Duration of lif
1. In the town of Jasper, CA, there is currently one full-time family doctor. If the town's population grows at a steady rate of 14% per year, how many family full-time family doc
locomotion in protozoa
Ethnobotany : This is the study of relationship between tribals and plants. Ethnobotany is from "ethnology" - study of culture or "botany" - study of plants. This is the scientific
Define Risk assessment Risk assessment has been described as the process of organizing information concerning a particular risk in a systematic way so that the dec
Describe the term - Ambulacral groove The groove that runs down the oral surface of each echinoderm arm and contain the tube feet. If the region contains a visible furrow, or gr
Clinical Manifestation Early onset of dyspnea on exertion (DOE) which progresses to continuous dyspnea. Rhonchi, crackles , accessory muscle breathing, Increased rate of br
#question.what do u mean by parasitic habit.give account of various parasitic adoptation in animal.
Lungs - Respiratory Organs In arachnid arthropods such as scorpion and spider, respiration takes place by means of book lungs. There are four pairs of these structures in the
list the long-term and short-term effects of forest destruction (a)on hillsides,(b)in the tropics?
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