Phospholipids are the main component of what important cell structure?

What type of matter is made of only one kind of atom

Consider the story you just read. all but one of the choices below indicate that something is living.

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.