Question

Presence of which of following elements in rock layers indicated mass extinction caused by a meteorite about 65 million years ago?

a.

iridium

b.

calcium

c.

titanium

d.

oxygen

Posted under Basics of cell Biology Cell Biology

Answer: (a).iridium

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Q. Presence of which of following elements in rock layers indicated mass extinction caused by a meteorite about 65 million years ago?
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