What is the main reason that a person sitting on the beach with an air temperature of 15 °C loses heat less rapidly than when immersed in lake water at 15 °C?
A) Water conducts heat more efficiently than air does.
B) Water evaporates, and heat is lost to evaporation.
C) Metabolic heat production is greater in air than in water.
D) Air is a poor insulator.
Answer: A
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How does position effect influence gene expression?
A. Point mutations in promoters frequently occur by this mechanism B. Translocations may result in a promoter that is normally used for one gene now controlling an entirely different gene C. Since this mechanism relies on recombination it relies on the positioning of one allele so that it is under the control of the other allele. D. Translocations always result in a gene being recombined into an area of heterochromatin.
In brown fat, ________ present in the inner mitochondrial membrane uncouples ATP synthesis from electron transport in infants and other newborn mammals.
A) thermogenin B) fluorocitrate C) coenzyme A D) submitochondrial particles E) respirasomes
A ________ diagram plots each species in a community, beginning with the most abundant and ending with the least abundant, along the x-axis, with the corresponding value of relative abundance on the y-axis
Fill in the blank(s) with correct word
Which statement best describes the phenomenon of antibiotic resistance in bacteria?
A) For a particular antibiotic, all bacteria are either completely resistant or completely sensitive. B) When a type of bacteria is resistant to antibiotics, it's resistant to all antibiotics. C) Resistance is a matter of degrees; resistance can be partial or total, and resistance to each antibiotic is a separate trait. D) Resistance to antibiotics is a trait that didn't exist before antibiotics were developed for pharmaceutical use.