Following the Deepwater Horizon accident in the Gulf of Mexico in 2010, bioremediation was used to eliminate much of the oil from the contaminated water. To encourage the growth of oil-degrading microbes, "fertilizer" including iron and nitrogen was added to the water. Which of the following statements regarding the growth of these microbes is incorrect?
A. The oil-degrading microbes used oil (hydrocarbons) as their carbon source.
B. The concentration of sulfate in the Gulf of Mexico is sufficient for the growth of oil-degrading microbes.
C. Large amounts of iron were needed, as iron is a macronutrient for oil-degrading microbes.
D. Nitrogen gas (N2) present in air is not in a form that can be used by oil-degrading microbes.
Answer: C
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Answer the following statement true (T) or false (F)
In a P1 cross involving incomplete dominance, ____
a. the dominant phenotype is expressed in the F1 b. the recessive phenotype is expressed in the F1 c. Mendelian inheritance does not apply d. the phenotypic ratio and genotypic ratio in the F1 are identical e. heterozygotes will express the parental phenotype
In an experiment, the control group:a
disproves the theory. b. proves the hypothesis. c. proves the prediction. d. does not contain the variable being tested. e. is similar to the test group in all aspects including the variable being tested.
____ are responsible for antibody-mediated immunity
a. Natural killer cells b. Macrophages c. T cells d. B cells e. Dendritic cells