The emt shows correct understanding of the circulatory system when he identifies the primary function of the heart as:

There are six elements that make up most of the human body. which of the following is not one of these six elements?

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z