/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: DrPrasadgeevan https://cdn.slidesharecdn.com/profile-photo-DrPrasadgeevan-48x48.jpg?cb=1523655064 Teaching is the profession that teaches all the other professions.... Have done my PhD in Environmental sciences related to biological toxicity.Currently working as a biology instructor in a UK based on line tutoring company based at chennai.