Use the following study to answer the following question(s): A researcher applies varying amounts of fertilizer (0, 2, 4, 8, 10 units) to 50 potted tomato plants. All other variables that may affect the outcome (watering, temperature, sunlight, plant size, etc.) are kept the same from pot to pot. At the end of the growing season, the tomatoes grown on each plant are weighed to determine which fertilizer level produced the largest tomato yield.Which variable is the dependent variable?
A. The plant size at the end of the growing season
B. The tomato yield at the end of the growing season
C. The temperature
D. The fertilizer amount
Answer: B
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A. translation. B. replication. C. transcription. D. replication and transcription. E. replication and translation.
Small groups of individuals leave their home population and establish new settlements, mating only among themselves, are referred to as the
A. founder effect. B. bottleneck effect. C. artificial effect. D. natural effect. E. migration effect.
A heart with three chambers, one atrium, and two ventricles is shared by _____
a. reptiles and mammals b. reptiles and amphibians c. amphibians and mammals d. birds and mammals e. birds and reptiles
Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?
a. lipids b. starches c. proteins d. steroids e. glucose