The presence of the loop of Henle allows which animals to reabsorb water and produce a hypertonic urine?
A. birds
B. marine fish
C. mammals
D. birds and mammals
E. freshwater fish and mammals
F. birds and reptiles
D. birds and mammals
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Which of the following is NOT a defining characteristic of sanitary landfills?
A. Sanitary landfills are designed to safely dispose of hazardous waste. B. Sanitary landfill waste is compacted into layers and covered with topsoil. C. Sanitary landfills are lined with plastic and compacted clay to contain waste. D. Sanitary landfills are designed to collect and monitor leachate. E. Sanitary landfills can be transformed into parks after closure.
The green arrow in the diagram above represents:
a) number of evolved characteristics. b) direction of stabilizing evolution. c) number of common ancestors. d) evolutionary advancement. e) time.
For Mendel's law of segregation requires that
A. the genes for the traits he studied must be located on the same chromosome. B. two alleles at any locus are distributed into separate gametes during meiosis. C. genes are not transmitted independently of each other. D. chromosomes be duplicated by mitosis. E. only triploid organisms demonstrate inheritance patterns.
How does aspirin act to decrease the symptoms of inflammation?
A) It acts as an antiprostaglandin. B) It is an antitoxoid for most microbial toxins. C) It prevents complement activation. D) It interferes with the action of interferons. E) It blocks the release of histamine.