What is the name of the process in meiosis that causes variation to take place​

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.