Answer the following question given this paragraph: Some of the present emerging diseases are not actually new, but are diseases that were catastrophic in the past (Figure 22.23). They devastated populations and became dormant for a while, just to come back, sometimes more virulent than before, as was the case with bubonic plague. Other diseases, like tuberculosis, were never eradicated but were under control in some regions of the world until coming back, mostly in urban centers with high concentrations of immunocompromised people. The WHO has identified certain diseases whose worldwide re-emergence should be monitored. Among these are two viral diseases (dengue fever and yellow fever), and three bacterial diseases (diphtheria, cholera, and bubonic plague). The war against infectious diseases has no foreseeable end. Q: Dengue fever and yellow fever are examples of diseases caused by what type of pathogen? A:

OPTIONS:
- fungi
- bacteria
- worms
- virus

Answer: virus

Answer the following question given this paragraph: 8.7.1 Intermediate Filaments These are rope like filaments, 8-10nm in diameter and tend to give the structural stability to cells. Examples inculude Vimentin, neurofilaments and keratin. It is keratin which priniciply makes up hair, nails and horns. Q: Intermediate filaments tend to give the structural stability to what? A:

OPTIONS:
- nerves
- proteins
- muscles
- cells

Answer: cells

Answer the following question given this paragraph: The terms mass and weight, while often used interchangeably, are technically different terms. Mass is the quantity of inertia possessed by an object. Weight refers to the gravitational force acting on a mass, as measured on a scale. On the surface of the earth, the numerical values of mass and the corresponding force of gravity (weight) are approximately equivalent. For now, we will use the terms mass and weight interchangeably although mass is the more appropriate scientific term. Q: Weight refers to what force acting on a mass? A:

OPTIONS:
- electronic
- magnetic
- solar
- gravitational

Answer: gravitational

Answer the following question given this paragraph: Lastly, keep in mind the small size of bacteria. Together, all the bacteria in your gut may weight just about 2 pounds. Q: How much can the bacteria in your gut weigh? A:

OPTIONS:
- 2.2 pounds
- 2.15 pounds
- 2 kilograms
- 2 pounds

Answer:
2 pounds