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

Guidelines for diagnosis and treatment planning, Guidelines for diagnosis a...

Guidelines for diagnosis and treatment planning The diagnosis and planning the case is by far the most important step in the entire sequence of the treatment and due considerat

Inrinsic conduction system of the heart, The cardiovascular system controls...

The cardiovascular system controls the movement of blood through thousands of miles of capillaries so that every tissue  in every part of the body is perfused. Essential nutrients

Write two functions of proteins in biological system, Write two functions o...

Write two functions of proteins in biological systems. The important functions of proteins in biological systems are as follows: enzymes membrane carriers anti

Foods incriminated, Foods that are frequently incriminated in staphylococca...

Foods that are frequently incriminated in staphylococcal food poisoning include meat and meat products, poultry and egg products, egg, tuna, chicken, potato and macaroni, bakery pr

Left internal mammary artery and coronary artery, Left internal mammar...

Left internal mammary artery (LIMA): It is most often used for bypassing left anterior descending (LAD) coronary artery and its diagonal branch. The right internal mammary

Explain delavirdine, Explain Delavirdine Delavirdine (DLV, Rescriptor)...

Explain Delavirdine Delavirdine (DLV, Rescriptor) - Delavirdine is the least potent NNRTI. A study comparing delavirdine/zidovudine/didanosine, delavirdine plus either zidovud

Explain the basic concept of energy, Explain the basic Concept of Energy? ...

Explain the basic Concept of Energy? Energy in simple terms may be defined as the ability, or power, to do work. As a student of dietetics and nutrition, you already know that

What is the treatment of tuberculosis, What is the treatment of tuberculosi...

What is the treatment of tuberculosis The disease can be very effectively treated with the help of antibiotic therapy, rest and nourishing food. The key to the treatment is ear

What is the patients rbc volume, Tina administered 1 liter of sterile disti...

Tina administered 1 liter of sterile distilled water IV to a patient. Predict the direction (increase, decrease, no change) you would expect Tina's infusion to have produced in the

What is lipids, Define lipids 'lipids' defines substances as oils, fats...

Define lipids 'lipids' defines substances as oils, fats and waxes which can be only characterized by a large array of properties.  They are in general: -  coming from plant

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