Ovule, Biology

Assignment Help:

Ovule

The ovule, also known as the megasporangium is the forerunner of the seed. It consists of a central mound of tissue called the nucellus, which is enveloped by one or two coverings - the integuments. An ovule ready for fertilization consists of nucellar tissue enveloped almost completely by integument(s), leaving a small pore or opening at the apical end.

This opening, called micropyle is the main passage for the entry of the pollen tube into the ovule. This end of the ovule is generally referred to as the micropylar pole and the opposite pole where funiculus is attached is called the chalazal pole. The ovule is attached to the placenta through a stalk-like structure the funiculus. In the nucellus is present the female gametophyte which is commonly referred to as the embryo sac.

 


Related Discussions:- Ovule

Initial phase for nutritional treatment of neuro trauma, Define Initial Pha...

Define Initial Phase for nutritional treatment of neuro trauma patients? In this, the life threatening conditions need to be controlled first.  Soon the nutritional support mu

Explain about the freeze drying Method, Explain about the freeze drying Met...

Explain about the freeze drying Method? The Techniques of freeze-drying have been developed over the past half-century for the purpose of preserving certain biological material

Quantitative changes, Quantitative changes The quantitative changes in...

Quantitative changes The quantitative changes in the availability of the active biomolecules occur in order to compensate for the loss of efficiency of the system caused by th

Explain hydraulic formula, Q. Explain Hydraulic Formula? This relates t...

Q. Explain Hydraulic Formula? This relates to pressure gradient and velocity of flow: V2 = (Cv)2 2gh or V = (Cv) 2gh Wherein, V = velocity of flow Cv = coefficient

Arthropods - regeneration in invertebrates, Arthropods - Regeneration in In...

Arthropods - Regeneration in Invertebrates Among arthropods like insects, crustaceans, centipedes, scorpions and spiders, the capability of regeneration is low or not present.

Extraction of the tooth, Extraction of the tooth -In nonstrategic impo...

Extraction of the tooth -In nonstrategic importance -Diseased maxillary second molars with no opposing tooth , or with an opposing tooth in class l or lll occlusion that ar

Echocardiography, Echocardiographic evaluation should be performed in all p...

Echocardiographic evaluation should be performed in all patients with clinically suspected IE, including those with negative blood cultures.  Not only is TEE the preferred approach

Can you explain the process of branchiae, Q. What are branchiae? What are e...

Q. What are branchiae? What are examples of animals that "breath" through branchiae? Branchiae also known as gills are small portions of richly vascularized tissues external or

Capillaries - circulation, Normal 0 false false false E...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Structure of myofibril, STRUCTUR E OF A MYOFIBRIL - The dark bands ...

STRUCTUR E OF A MYOFIBRIL - The dark bands of the myofibril are termed the A-bands (Anisotropic bands). Each A-band has at its middle a light zone called H-zone (Henson'

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd