Fill in blank, !
anaerobic respiration is also called and there are two types: lactic acid performed by many (including humans) & ethanol fermentation performed by yeast

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses