Q: In addition to five classes of fish, what other classes make up the species of vertebrates? Read this paragraph and choose the correct option from the provided answers: There are about 50,000 living species of vertebrates. They are placed in nine classes: five classes of fish plus amphibians, reptiles, birds, and mammals. Choices: - amphibians , vertebrae , birds , and mammals - reptiles, birds, mammals, and primates - insects, amphibians, reptiles, and birds - amphibians, reptiles, birds, and mammals A:
amphibians, reptiles, birds, and mammals

Q: When referring to genes, what term describes the property of having multiple phenotypic effects? Read this paragraph and choose the correct option from the provided answers: Many genes have multiple phenotypic effects, a property called pleiotropy. Choices: - archetype - xerophyte - prototype - pleiotrophy A:
pleiotrophy

Q: What unit of power is equal to 1 joule of energy per second? Read this paragraph and choose the correct option from the provided answers: The rate at which a device changes electric current to another form of energy is called electric power . The SI unit for powerincluding electric poweris the watt. A watt equals 1 joule of energy per second. High wattages are often expressed in kilowatts, where 1 kilowatt equals 1000 watts. The power of an electric device, such as a hair dryer, can be calculated if you know the voltage of the circuit and how much current the device receives. The following equation is used:. Choices: - hertz - byte - volt - watt A:
watt

Q: Chemical formulas for ionic compounds are called what? Read this paragraph and choose the correct option from the provided answers: Chemical formulas for ionic compounds are called ionic formulas. A proper ionic formula has a cation and an anion in it; an ionic compound is never formed between two cations only or two anions only. The key to writing proper ionic formulas is simple: the total positive charge must balance the total negative charge. Because the charges on the ions are characteristic, sometimes we have to have more than one of a cation or an anion to balance the overall positive and negative charges. It is conventional to use the lowest ratio of ions that are needed to balance the charges. For example, consider the ionic compound between Na+ and Cl. Each ion has a single charge, one positive and one negative, so we need only one ion of each to balance the overall charge. When writing the ionic formula, we follow two additional conventions: (1) write the formula for the cation first and the formula for the anion next, but (2) do not write the charges on the ions. Thus, for the compound between Na+ and Cl, we have the ionic formula NaCl (Figure 3.5 "NaCl = Table Salt"). The formula Na2Cl2 also has balanced charges, but the convention is to use the lowest ratio of ions, which would be one of each. (Remember from our conventions for writing formulas that we don't write a 1 subscript if there is only one atom of a particular element present. ) For the ionic compound between magnesium cations (Mg2+) and oxide anions (O2), again we need only one of each ion to balance the charges. By convention, the formula is MgO. For the ionic compound between Mg2+ ions and Cl ions, we now consider the fact that the charges have different magnitudes, 2+ on the magnesium ion and 1 on the chloride ion. To balance the charges with the lowest number of ions possible, we need to have two chloride ions Saylor URL: http://www. saylor. org/books. Choices: - electronic formulas - velocity formulas - magnetic formulas - ionic formulas A:
ionic formulas