Oxygen-rich blood is sent to rest of the body through the . Pulmonary vein
Superior vena cava
Aorta
Pulmonary artery

Which of the following represents a negatively charged ion? of t 7

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

Why are common names a problem for scientist?