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

Explain indifferences in ionic composition, Indifferences in ionic composit...

Indifferences in ionic composition Answer A. across membranes can be created through the action of ATP driven pumps as long as number of negative and positive ions on remain equal

Explain about the smoking - methods of food processing, Explain about the S...

Explain about the Smoking - methods of food processing? Smoking was known as a method of food preservation at an early date. Foods are exposed to smokes by burning some special

Assigment, describe food procurement and digestion in ciliates.

describe food procurement and digestion in ciliates.

Explain the liver organ, Explain the Liver organ? The liver is the larg...

Explain the Liver organ? The liver is the largest internal organ in the human body. It lies just below the diaphragm in the upper right area of the abdominal cavity. It is an i

Define nervous system and the it's related disorders, Define Nervous System...

Define Nervous System and the it's related disorders? In this unit, we learnt about nervous system and the related disorders, which are termed as 'neurological disorders'. Neur

Define significance of plants and animals on human life, Define Significanc...

Define Significance and Impact of Plants and Animals on Human Life? Plants and animals both have a great significance and unparalleled impact on human life. Most of our needs a

Processing of wastes from food industry, Processing of wastes from food ind...

Processing of wastes from food industry Various cellulosic wastes are available abundantly from food processing industry such as fruits and vegetable processing, breweries, st

Female reproductive disorders-dystocia, Dystocia Dystocia or difficult...

Dystocia Dystocia or difficult calving is a condition where help is required as providing traction, repositioning of fetus, foetotomy or caesarotomy. Generally, ease of calvin

Handling microorganisms, Handling : You can reduce direct contact with mic...

Handling : You can reduce direct contact with microorganisms by careful handling and by wearing protective clothing such as rubber gloves, mask, lab coat, etc. Even if you entirel

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