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!
Types of Ovules
Anatropous
This is the most common type of ovule in angiosperms in which the ovule undergoes curvature such that the micropylar end comes to lie parallel to the funiculus.
Orthotropous
In this type of ovule no curvature occurs and the micropyle lies in a straight line with respect to the funiculus.
Hemi anatropous
The hemi anatropous condition results from the curvature of the ovule such that the micropyle comes to lie at right angles to the funiculus.
Campylotropous
In campylotropous type, the ovule is curved but the curvature is less than that in the anatropous condition.
Amphitropous
The amphitropous ovule looks like the campylotropous ovule at the first glance. But there is a point of distinction. In this type the nucellus and the embryo sac are curved like a horse shoe.
Circinotropous
Besides the above basic forms, another interesting type that you should know is the circinotropous ovule. In the early developmental stages of such ovules the .nucellar protuberance is more or less in line with the axis. In the further developmental stages, due to unilateral growth, it assumes anatropous form. The curvature does not stop at this, but continues until the ovule has turned over completely so that the micropylar end again points upwards. This kind of ovule is common in families Cactaceae and Plumbaginaceae.
general characteristic of phylum protozoa
discuss the merits nd demerits of five kingdom classification.
what is arthropods?
What the difference is between type I diabetes mellitus and type II diabetes mellitus? Type I diabetes, also called as juvenile diabetes, or insulin-dependent diabetes (this na
What are Flavanols? Examples are catechin and epicatechin. You may have heard of the benefits of tea. Some of them are due to gallic acid, which is combined with epicatechin. F
complete definition of Sporogenous tissue
how many types of respiration are?define them also
Q. Classification of plant on the basis of their resemblances? Pliny seemed to have little interest in the classification of plant on the basis of their resemblances. He classi
Catalysts are substances that decrease the activation energy of a chemical reaction, facilitating it or making it energetically viable. The catalyst enhances the speed of the chemi
Q Are bacteria the only prokaryotic beings? Prokaryotic beings are classified into two big groups: bacteria and archaebacteria (this last also known as eubacteria). Compared
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