March, 2019

• 30 March

  Chromosomal Aberration: Structural and Numerical

  

  What is Chromosomal Aberration? Any type of change in the structure and number of chromosomes due to certain irregularities during cell division is known as chromosomal aberration. Broadly such aberrations are divided into two major groups. Structural aberration Numerical aberration Again, structural aberrations are of 4 types. Such as: Deletion …

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• 30 March

  Solenoid Model: The Second Level of Packing

  

  In the nucleosome model of chromosome, we have discussed about the fundamental organizational unit of chromosome termed as nucleosome. That article gave us a simplistic idea about how the repeated nucleosomes are arranged. The figure in the right hand side clarifies that the nucleosome model provides us with the insight …

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• 30 March

  Nucleosome Model of Chromosomes

  

  Let’s kick off this discussion with a simple calculation about the length of DNA in a single diploid human cell. We know according to Watson and Crick model of double helix DNA, each two base pairs has a distance of 3.4 A. There are approximately 6.4 billion base pairs (bp) …

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• 23 March

  The Megasporangium: Types, Parts and Functions

  

  Megasporangium is the structure of a plant body that contains a female reproductive organ. It can be called an ovule.  It consists of nucellus and integument. The ovule can be formed in different sizes and shapes. Many times it changes its form during the course of its development.   Mature …

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• 19 March

  Coliform Bacteria: An Indicator of Water Contamination

  

  Coliform is commonly known as ” indicator organisms“, refers to a wide groups of bacteria ( about 16 species) that found throughout the environment and used to evaluate the water quality.  These organisms have a wide distribution in soil, water surface, vegetations as well as on the skin or intestinal …

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• 11 March

  The Best Medical Cannabis Dispensaries in Toronto

  Looking for the best medical cannabis dispensaries in Toronto? Look no further! Here at Medical Cannabis Dispensaries, they offer a variety of high-quality products to help patients with a variety of conditions. Whether you are looking for dried flower, concentrates, edibles, or topicals, these below mentioned dispensaries have something to …

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• 3 March

  The Microsporangium & the Male Gametophyte

  

  Microsporangium: The sporangium that is connected with the production of microspores (pollen grains) eventually development of male gametophyte is known as microsporangium. Microsporangia are produced on stamen where each stamen has a bilobed anther (each lobe has two microsporangia), connective and anther filament. When anther produces four elongated microsporangia, the …

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February, 2019

• 25 February

  Programmed Cell Death

  

  The acronym of PCD is Programmed Cell Death. The death of a cell in any form, mediated by an intracellular program is called programmed cell death. PCD is carried out in a biological process, which gives advantage during an organism’s life cycle. History The concept of PCD was used by …

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• 23 February

  ভাইরাস অন্য কোন জীবিত কোষ ছাড়া বংশবৃদ্ধি করতে পারেনা। কিন্তু কেন?

  

  ভাইরাস কোন বাহকের দেহ ছাড়া বাঁচতে পারলেও মৃতের মত আচরণ করে এবং বংশবৃদ্ধি করতে পারেনা। এই তথ্যটা আমরা যখন থেকে ভাইরাসের বৈশিষ্ট্য পড়ে আসছি সেদিন থেকেই জানি। সবাই জানি। কিন্তু কেন এমন হয়? আচ্ছা T2 bacteriophage ভাইরাসের নাম তো শুনেছি সবাই। এই ভাইরাস বংশবৃদ্ধির জন্য ব্যাকটেরিয়ার দেহ বেছে নেয় কেন? …

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• 21 February

  Bionic plant: Detector of Deadly Landmines

  

  Introduction We all heard the term “Plant”. Whenever this term arises the first view that comes to our mind is a substance that stands for  providing  foods, shelter,  shade and basic things which are must for our existence on earth.  What if the plants could tell itself whether there is …

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