How do the Laws of Conservation relate to the Carbon Cycle, Water Cycle, and Nitrogen Cycle?

Embryos of different species look very similar, which shows that the organisms share a ancestor.

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.

Which fact represents evidence for the big bang theory?