Cicadas are an unusual-looking insect belonging to the order Hemiptera (the true bugs, including bed bugs and aphids). If you live in the eastern United...
The element nitrogen is critical in the living world. It is a basic building block of structural and regulatory proteins, nucleic acids, and chlorophyll...
Eukaryotes are multicellular organisms that contain diverse differentiated cell types. Within almost every cell there are subcellular compartments called...