Which of the following is NOT in the thoracic cavity?

Many vitamins are an important dietary ingredient, because they are:  

The cytoskeleton is composed of fibers of

Which of these is an organic molecule that is NOT considered a macronutrient?   ​

According to the cell theory, all living organisms are composed of: ​

The rough ER makes _____, whereas the smooth ER makes _____.   ​

If an animal cell is living in water that is much saltier than the cell’s cytoplasm, the water will:

What theory states that mitochondria and chloroplasts are derived from free-living prokaryotic cells?   ​

The exterior surface of the bilayer in a cell membrane:   ​

Which statement about cell membranes is true?   ​