Biology Blogs For Class11th, 12th and NEET

                                                                                                                                               Spindle Fibre  What is the Spindle Apparatus - Spindle apparatus also called spindle fiber is the structure that's separate the chromosomes into daughter cells during cell division. Depending upon the type of cell division , it is also referred to as mitotic spindle during mitosis and meiotic spindle during meiosis.  Shape and Formation -  The cellular spindle apparatus includes the spindle microtubules, associated proteins, and any aster present at the spindle poles. The spindle apparatus is vaguely ellipsoid in shape and tapers at the end but spread out in the middle portion also known as midzone. At the pointed ends, known as spindle poles , microtubules are nucleated by the centrosome or aster in most of the animals cells.  Assembly, Chromosome Attachment, and Function During Cell Divison -  During spindle assembly in prometaphase,

                                     Canal system in Sycon  A sea creature called a sycon, or scypha , is usually found clinging to rocks or other surfaces. These creatures have tube-shaped bodies that open outward with the help of a hole called an Osculum . They have tiny openings called Spiracles and Ostia all over their bodies to let water in. This water flows through canals inside their bodies and comes out through the Osculum, which is a larger opening used for breathing. We'll observe the shape of this canal system, why it is essential for those animals, type of canal system , and  its significance. The Sycon Type Canal system is the unique feature of the phylum Porifera . This system is also known as the  aquiferous canal system . This system supports the significant function of the body like nutrition, respiration, excretion, etc. History Overview -  Grant, a scientist from Scotland, spent a lot of time studying sponges. He was one of the first to really explain how t