4. Which of the following statements about physical digestion and chemical digestion is correct?
A. Bile involves both physical and chemical digestion.
B. In the mouth cavity, carbohydrates undergo physical digestion only.
C. In both types of digestion, food substances are broken down into simpler molecules.
D. Physical digestion can enhance the efficiency of chemical digestion.

No plagiarizing ! 6th grade work! easy and 100 compare the parts of a cell and the cell as a whole to another common nonliving system (i.e., a car, a city, describe the parts of a cell and their primary function.

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!

Which elements are in the substance that makes up about 60% of the male human body