Answer the following question given this paragraph: Bacteria are the most diverse and abundant group of organisms on Earth. They live in almost all environments. They are found in the ocean, the soil, and the intestines of animals. They are even found in rocks deep below Earth's surface. Any surface that has not been sterilized is likely to be covered with bacteria. The total number of bacteria in the world is amazing. It's estimated to be 5 10 30 , or five million trillion. You have more bacteria in and on your body than you have body cells!. Q: What is the most diverse and abundant group of organisms on earth, numbering in the millions of trillions? Choices: - viruses - pests - pathogens - bacteria A:
bacteria
(Question)
Answer the following question given this paragraph: The properties of matter, both physical and chemical, depend on the substances that matter is made of. Matter can exist either as a pure substance or as a combination of different substances. Q: Matter can exist either as a pure substance or as a combination of what? Choices: - Different Liquids - much substances - different vapors - different substances A:
(Answer)
different substances
Ques: Answer the following question given this paragraph: Heats of reaction are typically measured in kilojoules. It is important to include the physical states of the reactants and products in a thermochemical equation as the value of the depends on those states. Q: What units are typically used to measure heats of reaction? Choices: - degrees Celsius - volts - kilobytes - kilojoules A:
Ans: kilojoules
(Q).
Answer the following question given this paragraph: Summary The major types of solids are ionic, molecular, covalent, and metallic. Ionic solids consist of positively and negatively charged ions held together by electrostatic forces; the strength of the bonding is reflected in the lattice energy. Ionic solids tend to have high melting points and are rather hard. Molecular solids are held together by relatively weak forces, such as dipoledipole interactions, hydrogen bonds, and London dispersion forces. As a result, they tend to be rather soft and have low melting points, which depend on their molecular structure. Covalent solids consist of two- or three-dimensional networks of Saylor URL: http://www. saylor. org/books. Q: Ionic, molecular, covalent, and metallic are major types of what state of matter? Choices: - gas - liquid - plasma - solids A:
(A).
solids
Ques:Answer the following question given this paragraph: Telomerase and Aging Cells that undergo cell division continue to have their telomeres shortened because most somatic cells do not make telomerase. This essentially means that telomere shortening is associated with aging. With the advent of modern medicine, preventative health care, and healthier lifestyles, the human life span has increased, and there is an increasing demand for people to look younger and have a better quality of life as they grow older. In 2010, scientists found that telomerase can reverse some age-related conditions in mice. This may have potential in [2] regenerative medicine. Telomerase-deficient mice were used in these studies; these mice have tissue atrophy, stem 2. Jaskelioff et al. , "Telomerase reactivation reverses tissue degeneration in aged telomerase-deficient mice," Nature 469 (2011): 102-7. Q: Cells that undergo cell division continue to have their telomeres shortened, thus telomere shortening is associated with what life process? Choices: - metabolism - reducing - reproduction - aging A:

Ans:aging
Ques:Answer the following question given this paragraph: Sublimation and Deposition Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublime at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes and a vivid purple vapor forms (Figure 10.27). The reverse of sublimation is called deposition, a process in which gaseous substances condense directly into the solid state, bypassing the liquid state. The formation of frost is an example of deposition. Q: What is the process by which some solids transition directly into gases? Choices: - articulation - vaporization - amplification - sublimation A:

Ans:
sublimation