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Saturday, January 11, 2020

"Biology is the study of complicated things that give the appearance of having been designed for a purpose"

-- Richard Dawkins

Steps of Fertilization

Fertilization is the union of male and female gametes to produce a zygote. There are several steps of fertilization. They are described below.Germination...

Female Gametophyte: The Embryo Sac with Its Types

Depending on the number of megaspore nuclei taking part in the development, the female gametophytes of angiosperms may be classified into three main types:...

Nemec Phenomenon: Embryo Sac Like Pollen Grain

In 1898 Nemec noted that in the petaloid anthers of Hyacinthus orientalis the pollen grains sometimes form large eight-nucleate structures showing a surprising resemblance...

Discovery about the Male, Female Gametophytes & Syngamy

Among early students of the development of pollen, Hofmeister (1848) presented some surprisingly good illustrations of the process of tetrad formation, and Reichenbach, Hartig...

Pollen Tube Discovery by G. B. Amici

Giovanni Battista Amici (1824) who was also a good microscope maker, found that the stigma of Portulaca oleracea was covered with hairs which contained...

Chemotaxonomy: Semantides

Semantides are information-carrying molecules. Semantides provide taxonomic data not on the basis of presence or absence, but in terms of sequences, ratios or percentages,. Semantides...

Chemotaxonomy: Secondary Metabolites

The chemical substances which have been found very useful in taxonomy are secondary metabolites. Secondary metabolites (secondary plant products) perform non-vital (or at least...

Chemotaxonomy: Introduction and Primary Metabolites

Plant Chemotaxonomy is one of the more fashionable and rapidly extending areas of plant taxonomy that seeks to utilize chemical information to improve classification...

Biosystematics: Steps and Categories

The steps in biosystematic investigation are as followsSampling of taxon and its population and cytological study of the chromosome of many population within...

Views on Species Concept

Species is the basic & smallest whit of classification which is represented by binomial nomenclature according to ICBN. Two individuals with maximum similarities which...

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উদ্ভিদপ্রেমীদের চোখে কার্জনহল দেখতে যেমন

ঢাকা বিশ্ববিদ্যালয়ের উদ্ভিদবিজ্ঞানের ছাত্রছাত্রীদের গাছের নাম জানা শুরু হয় কার্জনের গাছ দেখেই। কত হরেক রকম গাছ আছে আমাদের এই কার্জনে, আর উদ্ভিদবিজ্ঞানের বাগানে ঢুকলে...

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Study Botany in USA: Steps to Follow

প্রথমেই ক্ষমা চেয়ে নিচ্ছি আমার সেই সব জুনিয়র এর কাছে যারা কিনা আমাকে প্রায়ই নক দেয় এবং অনেক সময় হয়তো আমার পক্ষে ধৈর্য রেখে...

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