? 1. las sustancias puras son compuestos químicos. 2. las sustancias simples son sustancias puras. 3. una disolución es una mezcla heterogénea de dos componentes: el disolvente y el soluto. 4. los coloides son mezclas homogéneas de aspecto heterogéneo.

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.

Where can dna be found in a prokaryotic cell