This misquito is an example of a parasite because it takes the blood from my body and gives nothing in return except for, possibly, diseases. It also leaves an itchy bite mark.
The hair in this picture is a subdivision of the two main classes of proteins. The fibrous protein, is in the Scleroprotein class and has hair as an example.
This pistashio is an example of a dry seed indehiscent fruit. Indehiscent fruits are nuts, in which the ovary walls become very hard at maturatity and stay fused to the ovary wall.
Rhizomes are continuously growing horizontal underground stem that puts out lateral roots. Since this onion is the underground root of an organism that makes it a rhizome.