During which stage of wastewater treatment is the primary effluent aerated to allow for biodegradation by aerobic microbes?
A) Primary treatment
B) Secondary treatment
C) Disinfection
D) Sludge digestion
E) Sedimentation
B
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Characteristics between the branch points of a cladogram that are shared by all organisms above the branch point and are not present in any below it are called
A. homologous characters. B. homoplastic characters. C. ancestral characters. D. derived characters. E. novel characters.
Genetic map units represent ____
a. absolute physical distances between genes b. locations of different alleles of a gene c. the chromosome on which a given gene is located d. the actual DNA sequence of a gene e. relative positions of genes with respect to one another
Which reproductive strategy would allow the most rapid adaptation to a changing environment?
a. asexual reproduction b. sexual reproduction c. simultaneous sexual and asexual reproduction d. switching between sexual and asexual reproduction e. neither strategy is more adaptive than any other
Which of the following represents
xenotransplantation?
a. cows resistant to mad cow disease b. goats that produce spider silk c. corn with Bt genes d. pigs carrying human livers e. more than one of these represents xenotransplantation