What characteristic of carbon atoms to explain the wide variety of organic compounds

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

There is one girl i like and i don't know how to tell her that, i have a feeling she knows but if she doesn't i don't want to make a fool out of myself how is one way to boost my confidence on asking her out

Draw the structure for 5-isopropyl-2-methyl-3-nonene