*Question*
Answer the following question given this paragraph:      Q: The toothlessness of modern birds, which serves to trim the weight of the head, is an example of what?   Choices:  - mutation  - genetic drift  - variety  - adaptation  A:
**Answer**
adaptation

*Question*
Answer the following question given this paragraph:   It could easily be said that a cell is the fundamental unit of life, the smallest unit capable of life or the structural and functional unit necessary for life. But whatever it is, a cell is necessary for life. The Cell Biology chapter will discuss some of the fundamental properties of the cell, with lessons that include the cell structure, transport in and out of the cell, energy metabolism, and cell division and reproduction.   Q: What can be thought of as the fundamental unit of life?   Choices:  - ion  - atom  - electron  - cell  A:
**Answer**
cell

*Question*
Answer the following question given this paragraph:   The story is quite different for gases. Gases take the shape of their container, and they are relatively easy to compress. There are fewer gas particles per unit volume than for the same substance in the liquid or solid form. In fact, the liquid form of a given material is generally several hundred times more dense than the gas form at normal pressures. Despite the large amounts of empty space, a sample of a gas contains many particles moving around, colliding and imparting force on their surroundings. For example, in a one mole sample of gas at 0°C and 1 atm of pressure, each cubic centimeter contains roughly 2.7 × 10 19 molecules. Each molecule participates in several billion collisions every second, moving only about 10-100 nanometers between collisions. Additionally, these gas particles move at very high speeds. For example, at 25°C, the average speed of hydrogen molecules in a sample of hydrogen gas is 1960 m/s.   Q: What take the shape of their container, and are relatively easy to compress?   Choices:  - molecules  - semi-fluids  - fluids  - gases  A:
**Answer**
gases

*Question*
Answer the following question given this paragraph:   layers: mucosa, submucosa, muscularis, and serosa. The enteric nervous system provides intrinsic innervation, and the autonomic nervous system provides extrinsic innervation.   Q: The enteric nervous system provides intrinsic innervation, and the autonomic nervous system provides this?   Choices:  - arise innervation  - complex innervation  - autonomic innervation  - extrinsic innervation  A:
**Answer**

extrinsic innervation