The area within a gene that is not translated into protein is called a(n):
A) allele.
B) intron.
C) base.
D) codon.
E) locus.
B) intron.
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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.Is the study presented above a controlled experiment?
A. Yes, because many pots were used. B. No, because the experiment was done only once. C. No, because several different amounts of fertilizers were used, not just one amount. D. Yes, because only the amount of fertilizer was changed, everything else was kept the same.
Which one of the following species is endangered by human activity but not yet extinct?
A. the dodo B. the dusky seaside sparrow C. the African white rhinoceros D. the carrier pigeon E. the Bali tiger
Assume that in guinea pigs, dark brown fur (B) is dominant to black fur (b). If you mate a black guinea pig with a homozygous brown guinea pig, what proportion of the progeny will be homozygous?
A) none B) 1/4 C) 1/2 D) 3/4 E) all
Explain how the overuse of antibiotics could lead to the evolution of drug resistant strains of bacteria.
What will be an ideal response?