Which muscle originates at the clavicle, sternum, and costal cartilage of the upper ribs and inserts at the greater tubercle of the humerus?

Witch type of microscope is used to view very small cell components like proteins and dna?

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass

How and why organisms are hierarchically classifies