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Chromosomes are the principal component of the nucleus of higher plants. It contains genes that are arranged in a linear order and maintain hereditary stability. In the cell, the chromosome morphology looks like a coiled thread structure when nuclear division is started and becomes condensed at later stages. brief History of chromosome […]
The angiosperms are thought to represent the climax of an extensive evolution and it would appear that the evolution of angiosperm has been still a continuous process. principal evolutionary tendencies of the flowers The principal evolutionary tendencies of the flowers: Elongated floral axis to shortened floral axis. Spiral arrangements of floral parts to the
The higher vascular plants possess a large variation in the arrangements and structure of the primary tissues in their roots, stems and leaves. Primary tissues in the dicotyledonous stem Anatomically, the stem possesses a dermal tissue system from where the epidermis, vascular tissue system develops. Next vascular bundles and the ground tissue system originate from
What are Primary Tissues? Various sections of primary tissues Read More »
A herbarium is a place of the depository of plant specimens in dry conditions. According to H. M. Lawrence (1967), a herbarium is a collection of plant specimens after dried and pressed, these plant specimens are arranged in the sequence of an accepted classification, and are also available for reference or other
What is a Herbarium? preparation, importance, functions and botanical gardens Read More »
The study about chemical, organic or inorganic elements and compounds present in the soil but necessary for metabolism, growth and proper development of the plant body, is called Plants Nutrition. Both plants and animals require minerals for their development. In its absence, the plants are unable to complete their normal life cycle. Criteria of Essentiality
What is Plants Nutrition? Things you need to know Read More »
All the unicellular organisms complete their biological and physiological work through their only one cell. But the multicellular organism originates from the zygote and forms multiple cells through the constant division of the zygote. Thus a group of cells consist of different size and shapes that are functioned togetherly as a unit, they are called
What is plant tissue? Definition and various types of plant tissue Read More »
In our previous post, we learnt about the mechanism and different parameters. If you missed it please check our ‘ A to Z about transistor‘ post first for better understanding. In this post, we will discuss about the different characteristics of transistors and their uses. So let’s get into it. Different modes There are three
Characteristics of Transistors and their uses || part 2 Read More »
The transistor is the most revolutionary device in the field of technology. You probably read this post either on a mobile or computer or tablet; each of which contains a huge amount of ICs inside them. Many of those ICs consist of a large number of transistors. What is a Transistor? If you go through
For a successful publication of name, a scientific name must need an effective and valid publication by which this name will be acceptable in the whole world. The international code botanical nomenclature is based on the following sets of 3 principles, which are the philosophical basis of the code and provide guidelines for the taxonomists
Development of botanical code For several centuries the names of plants appeared as polynomials – which may be difficult to remember. Casper Bauhin at first in 1653 introduced Binomial Nomenclature, in which the scientific name of species consists of two parts, firstly the generic epithet and secondly the specific epithet. Ex – Scientific name of
Development of botanical code, the type method and Author citation Read More »