*Question*
Q: Electrons are always added to which energy level first? Read this paragraph and choose the correct option from the provided answers: Electrons are always added to the lowest energy level first until it has the maximum number of electrons possible, and then electrons are added to the next higher energy level until that level is full, and so on. The maximum number of electrons at a given energy level depends on its number of orbitals. There are at most two electrons per orbital. Choices: - the highest - the second - the major - the lowest A:
**Answer**
the lowest

*Question*
Q: There is always a slightly negative pressure within what cavity, helping keep the airways of the lungs open? Read this paragraph and choose the correct option from the provided answers: There is always a slightly negative pressure within the thoracic cavity, which aids in keeping the airways of the lungs open. During inhalation, volume increases as a result of contraction of the diaphragm, and pressure decreases (according to Boyle's Law). This decrease of pressure in the thoracic cavity relative to the environment makes the cavity less than the atmosphere (Figure 39.16a). Because of this drop in pressure, air rushes into the respiratory passages. To increase the volume of the lungs, the chest wall expands. This results from the contraction of the intercostal muscles, the muscles that are connected to the rib cage. Lung volume expands because the diaphragm contracts and the intercostals muscles contract, thus expanding the thoracic cavity. This increase in the volume of the thoracic cavity lowers pressure compared to the atmosphere, so air rushes into the lungs, thus increasing its volume. The resulting increase in volume is largely attributed to an increase in alveolar space, because the bronchioles and bronchi are stiff structures that do not change in size. Choices: - anal - cervical - spinal - thoracic A:
**Answer**
thoracic

*Question*
Q: Pavement cells, large, irregularly shaped parenchymal cells which lack chloroplasts, make up the majority of what? Read this paragraph and choose the correct option from the provided answers: This tissue includes several types of specialized cells. Pavement cells, large, irregularly shaped parenchymal cells which lack chloroplasts, make up the majority of the epidermis. Within the epidermis, thousands of pairs of bean-shaped schlerenchymal guard cells swell and shrink by osmosis to open and close stomata , tiny pores which control the exchange of oxygen and carbon dioxide gases and the release of water vapor. The lower surfaces of some leaves contain as many as 100,000 stomata per square centimeter. Choices: - dermis - layers - Skin - epidermis A:
**Answer**
epidermis

*Question*
Q: What was diorite commonly used for in ancient civilizations? Read this paragraph and choose the correct option from the provided answers: An example of a physical model is a drawing of the layers of Earth ( Figure below ). A drawing helps us to understand the structure of the planet. Yet there are many differences between a drawing and the real thing. The size of a model is much smaller, for example. A drawing also doesn't give good idea of how substances move. Arrows showing the direction the material moves can help. A physical model is very useful but it can't explain the real Earth perfectly. Choices: - school - currency - medicine - art A:
**Answer**
art