Both aquatic and terrestrial organisms must have __________ across which gas exchange can take
place.
a. a respiratory system
b. tracheal tubes
c. gills and lungs
d. stratified squamous epithelial tissue
e. a moist surface
E
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A. picrophilic. B. alkylophilic. C. barophilic or barotolerant. D. acidophilic.
The first law of thermodynamics is a restatement of the
What will be an ideal response?
Mendel’s principle of segregation is directly related to an event that occurs in ______ of meiosis
A. prophase I B. metaphase I C. anaphase I D. prophase II E. metaphase II
Usually, bacteria only make tryptophan when tryptophan is absent or available in low concentration. However, a particular bacterial mutation makes tryptophan all the time whether or not tryptophan is present. What could explain this phenotype?
A) trpA is mutated B) trpE is mutated C) trpD is mutated D) the antiterminator hairpin is unable to form E) the terminator hairpin is unable to form