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!
Q. How do zygote and fecundation formation occur in these plants? Do these processes depend on water?
The microsporangia in the male strobile rupture at the right time of the year releasing thousands of pollen grains. As their pollen grains are "winged" they can be transported by the wind above distances. When the pollen grains fall keen on the female strobiles they enter the pollen chamber and pass the micropyle. This procedure is called as pollination.
Inside the pollen chamber the generative cell nucleus divides forming two gametic nuclei and the tube cell elongates forming the pollen tube. The pollen tube goes through the female gametophyte as well as the gametic nuclei (also known as sperm nuclei) pass through the tube; one of them unites with an oosphere (the female gamete) and forms the zygote (2n). Usually fecundation occurs one year after pollination and during this time interval the maturation of the male and of the female gametes takes place.
The fecundation inside these plants is independent from water. The gametophytes though are entirely dependent on the sporophyte (the adult plant) for nutrition and hydration.
How Primarily Energy Deficiency cause PEM? Surveys on preschool children in different parts of the country reveal that PEM is primarily due to dietary energy deficiency arising
Pasteurellosis Haemorrhagic septicaemia (HS) Synonym : Gal Ghotu Causative organism B:2 : Pasteurella multocida Serotype Haemorrhage sept
Certain conditions such as excessive alcohol consumption can increase the ratio of NADH/NAD+ in the mitochondria. This will directly inhibit which of the following enzymes? -cit
Q. How is the depolarization of the neuronal plasma membrane generated? How does the cell return to its original rest? When the neuron receives a stimulus by the permeability o
Q. Define the Ionizing radiation for sterilization? Ionizing radiation are high energy electromagnetic waves including X-rays, gamma rays, particulate radiation, cosmic rays wh
Explain Lipid Formulations Three lipid formulations of amphotericin B are marketed in the US: amphotericin B lipid complex (ABLC, Abelcet), liposomal amphotericin B (L-AmB, AmB
Methods of entrainment to food and survival advantages Because of weak zeitgeber of light (during winter and summer months where there is very little change in photoperio
PEROXISOMES AND GLYOXYSOMES Certain small ovoid unit membrane bound sac like cytoplasmic organelles, resembling lysosomes in size and appearance were isolated from var
GER M LAYER THEORY - Proposed by Pander, studied chick embryo development. Coined the term ectoderm, mesoderm & endoderm.
Fire Protection - Factors Affecting Occupational Health Fire protection and extinguishing devices require to be installed at proper places in the work place and proper notices
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