Amazing Contents

  Phylum :- PORIFERA                       — They are Spongy. — They are marine and mostly Asymmetrical. — They are multicellular animal. — Sponges have water transport or canal system. — Water enter through minut spores into body wall and to spongocel from where is go to osculum.  ( * Osculum :- Through which water expelled out )  — Through this path they gether found respiratory exchange and waste removal. — Digestion is intracellular. — The skeleten is made up of spicules and spongin fibres. — Sexes are not separated ( Hermophrodites ). — Sponges reproduce asexually by fragmentation and sexually by formation of gametes. — Fertilization is internal and development in indirect having a larval stage which is morphologically distinct from the adult. — EXAMPLE :- Sycon , Spongocoel

The  2020 Summer Olympics  officially the  Games of the XXXII Olympiad  and branded as  Tokyo 2020  is an ongoing international  multi-sport event  being held from 23 July to 8 August 2021 in  Tokyo , Japan, with some preliminary events that began on 21 July.  Tokyo was selected as the  host city  during the  125th IOC Session  in  Buenos Aires , Argentina, on 7 September 2013. [3]  Originally scheduled to take place from 24 July to 9 August 2020, the event was postponed to 2021 in March 2020 as a result of the  COVID-19 pandemic , the first such instance in the history of the  Olympic Games  (previous games had been cancelled but not rescheduled).  Tokyo is the first city in Asia to hold the Summer Games twice. The 2020 Games are the second of three consecutive Olympics to be held in East Asia, following the 2018 Winter Olympics in Pyeongchang, South Korea, and preceding t...