What molecule carries out most of the activities of life, including the synthesis of all other biological
molecules?
a. carbohydrate
b. lipid
c. protein
d. nucleic acid
e. carbon
C
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This occurs when there is a problem with controlling how cells divide and replace themselves.
A. crossing over B. nondisjunction C. cancer D. death
Which of the following events will occur as an ocean current moves from an equatorial region towards a polar region?
A. The current will be warm as it leaves the equatorial region and begins to cool as it moves towards the polar region. This in turn will cause the air currents to become warmer as they move closer to the poles, creating a desert type of biome. B. The current will be cool as it leaves the equatorial region and begins to warm as it moves towards the polar region. This in turn will cause the air currents to become cooler as they move closer to the poles, creating a tundra type of biome. C. The current will be warm as it leaves the equatorial region and begins to cool as it moves towards the polar region. This in turn will cause the air currents to become warmer as they move closer to the poles, creating a grassland type of biome. D. The current will be warm as it leaves the equatorial region and become even warmer as it moves towards the polar region. This in turn will cause the air currents to become warmer and drier as they move closer to the poles, creating a tundra type of biome. E. The current will be warm as it leaves the equatorial region and begins to cool as it moves towards the polar region. This in turn will cause the air currents to become cooler as they move closer to the poles, creating a tundra type of biome.
In the event that you are collecting data on how heights relate to income in the U.S. population and you notice that in your sample of 1,500 individuals you have a data gap at 5'6", will this cause an identification problem?
A. No, because data gaps cannot cause identification problems. B. Yes, but you can still extrapolate the data gap. C. No, because this data gap does not exist in the population. D. Yes, but you can still interpolate the data gap.
Answer the following questions true (T) or false (F)
1. A reversion mutation is when a base-substitution mutation is changed back to the original DNA sequence. 2. Many mutagens cause a rate of mutation that promotes the development of cancers; such mutagens are called carcinogens. 3. DNA transposons rely on the enzyme reverse transcriptase to insert a copy of cDNA into a new location in the genome.