If the PO2 in the alveolus is 80 mm Hg, will O2 diffuse, and if so, in what direction?
A.) O2 will diffuse from the blood to the alveolus
B.) O2 will diffuse from the alveolus to the blood
C.) O2 will not diffuse
Answer: B.) O2 will diffuse from the alveolus to the blood
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Which of the following organisms best describes a catalase-negative, gram-positive coccus that is hemolytic on sheep blood agar, and bacitracin positive?
a. Streptococcus pyogenes b. Streptococcus pneumoniae c. Staphylococcus epidermidis d. Micrococcaceae spp.
The liverwort genus Marchantia can reproduce asexually by way of ____, small cell masses that form in cuplike
growths on a ____.
a. antheridia; gemmae b. gemmae; thallus c. archegonia; thallus d. thallus; gemmae
e. antheridia; thallusGeneticists use ____ to study the genetics of families through generations
a. Punnett squares b. pedigrees c. karyotypes d. DNA profiles e. fossil analyses
In terms of the evolution of nervous systems, which events tend to occur in concert with one another?
a. brains; radial symmetry b. planaria; radial symmetry c. nerve net; bilateral symmetry d. cephalization; bilateral symmetry e. cephalization; radial symmetry