Which structure helps to prevent food from entering the trachea during swallowing? The uvula

The epiglottis

The vocal cords

All of the above

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

What is the name of the type of cell division that occurs in the prokaryotic cell cycle

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.