Answer the following question given this paragraph: We breathe because we need oxygen. Breathing also releases carbon dioxide from our bodies into the air. The respiratory system is the body system that brings air containing oxygen into the body and releases carbon dioxide into the atmosphere. Recall that oxygen is needed to make ATP. Q: Which system of the body is responsible for bringing air into the body? Choices: - vascular system - excretory system - digestive system - respiratory system A:
respiratory system
(Question)
Answer the following question given this paragraph: Cell division is just one of the stages that all cells go through during their life. This includes cells that are harmful, such as cancer cells. Cancer cells divide more often than normal cells, and grow out of control. In fact, this is how cancer cells cause illness. In these concepts, you will read about how cells divide, what other stages cells go through, and what causes cancer cells to divide out of control and harm the body. Q: All cells undergo what during a lifetime, but when this process is out of control, cancer results? Choices: - cell transition - cell death - cell mutation - cell division A:
(Answer)
cell division
Ques: Answer the following question given this paragraph: has a single main root that grows down. A fibrous root system forms a dense network of roots that is closer to the soil surface. An example of a tap root system is a carrot. Grasses such as wheat, rice, and corn are examples of fibrous root systems. Fibrous root systems are found in monocots; tap root systems are found in dicots. 37 Monocots have leaves with parallel venation, and dicots have leaves with reticulate, net-like venation. 39 The process of bulk flow moves water up the xylem and moves photosynthates (solutes) up and down the phloem. 41 Gravitropism will allow roots to dig deep into the soil to find water and minerals, whereas the seedling will grow towards light to enable photosynthesis. 43 To prevent further entry of pathogens, stomata close, even if they restrict entry of CO2. Some pathogens secrete virulence factors that inhibit the closing of stomata. Abscisic acid is the stress hormone responsible for inducing closing of stomata. Q: Grasses such as wheat, rice, and corn are examples of fibrous root systems. fibrous root systems are found in monocots; tap root systems are found in these? Choices: - mosses - monocots - gymnosperms - dicots A:
Ans: dicots
(Q).
Answer the following question given this paragraph: When normal cells are damaged beyond repair, they are eliminated. The upper diagram depicts damaged cells being destroyed. Cancer cells avoid elimination and, because of uncontrolled cell division, continue to multiply in an unregulated manner. The lower diagram depicts damaged cells dividing in an uncontrolled fashion. Q: What causes cancer cells to avoid elimination and continue to multiply? Choices: - continuous cell division - chronic cell division - persistent cell division - uncontrolled cell division A:
(A).
uncontrolled cell division
Ques:Answer the following question given this paragraph: A system is said to be in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite to the direction of the displacement. For example, a marble at the bottom of a bowl will experience a restoring force when displaced from its equilibrium position. This force moves it back toward the equilibrium position. Most systems are in stable equilibrium, especially for small displacements. For another example of stable equilibrium, see the pencil in Figure 9.11. Q: A system is said to be in stable equilibrium if, when displaced from equilibrium, it experiences a net force or torque in a direction opposite to the direction of the what? Choices: - velocity - variation - dispersement - displacement A:

Ans:displacement
Ques:Answer the following question given this paragraph: Acetylene is an interesting example of a molecule with two central atoms, which are both C atoms. Polyatomic ions are bonded together with covalent bonds. Because they are ions, however, they participate in ionic bonding with other ions. So both major types of bonding can occur at the same time. Q: What is an interesting example of a molecule with two central atoms, which are both c atoms? Choices: - chloride - water - sulfur - acetylene A:

Ans:
acetylene