Q: Q: Protozoa can be classified on the basis of how they? Read this paragraph and choose the correct option from the provided answers: Protozoa can be classified on the basis of how they move. As shown in Table below , protozoa move in three different ways. Only sporozoa cannot move. Note that this classification is based only on differences in movement. It does not represent phylogenetic relationships. Choices: - smell - look - feel - move A:
A: move

Q: Q: Through which process is the human gene for insulin placed into bacteria? Read this paragraph and choose the correct option from the provided answers: Through the process of transformation, the human gene for insulin is placed into bacteria. The bacteria then use that gene to make a protein. The protein can be separated from the bacteria and then used to treat patients. The mass production of insulin by bacteria made this medicine much more affordable. Choices: - migration - mutation - absorption - transformation A:
A: transformation

Q: Q: Silver and ordinary table salt are two examples of chemical what? Read this paragraph and choose the correct option from the provided answers: Silver and ordinary table salt are two examples of chemical substances . A substance is matter that has a uniform and definite composition. All samples of substances, sometimes called pure substances, have identical properties. When chemists run a chemical reaction, they want to use pure materials so they know exactly what they are dealing with. They know that the reaction involves a specific substance, so they expect the same reaction to give the same results each time it is run. Choices: - organism - impurities - microbes - substances A:
A: substances

Q: Q: Aldehydes and ketones can work weak hydrogen bonds with water through what atom? Read this paragraph and choose the correct option from the provided answers: Aldehydes and ketones can work weak hydrogen bonds with water through the carbonyl oxygen atom. The lower members of both series (3 carbons or fewer) are soluble in water in all proportions. As the length of the carbon chain increases, water solubility decreases. Similar to ethers, neither aldehydes nor ketones can hydrogen bond with themselves. As a result, their boiling points are generally lower than those of alcohols. Unlike alkanes however, aldehydes and ketones are polar molecules due to the more electronegative oxygen atom. The dipole-dipole interactions are stronger than the dispersion forces present in alkanes. The boiling points of aldehydes and ketones are intermediate between those of alkanes and alcohols. For example, the boiling point of ethane is -89C, ethanal is 20C, and ethanol is 78C. Choices: - basalt oxygen atom - pyridinium oxygen atom - carbon carbon atom - carbonyl oxygen atom A:
A: carbonyl oxygen atom