Permian mass extinction happened ______?

Important Related MCQs:

• Mass Communication theory is important because it deals with:
• Mass attached to a spring executes _____?
• Mass can be converted into:
• Mass divided by volume is called _____?
• Mass extinction of dinosaurs occurred in which period?
• Mass is a ____
• Mass is same physical quantity as
• Mass is to Kilogram as Universe is to:
• Mass media helps in
• Mass number A refers to _____