When submerged, frogs receive most of their O2 from capillaries within the skin. What structure would contain blood with the highest O2 concentration in a submerged frog, which is not able to breathe using its lungs?
A. left atrium
B. ventricle
C. right atrium
D. pulmonary vein
E. aorta
C. right atrium
Biology & Microbiology
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Mycobacterium and Nocardia are distinguished from other bacteria by the ________ stain.
A. basic B. Gram C. acid-fast D. endospore E. methylene blue
Biology & Microbiology
Which cells are produced during meiosis I?
a. spermatogonia b. primary spermatocytes c. secondary spermatocytes d. spermatids e. sperm
Biology & Microbiology
A circulatory system that allows some mixing of oxygenated and oxygen-poor blood is indicated by the letter(s) ____
a. A only b. B only c. C only d. A and B only e. B and C only
Biology & Microbiology
During which of the following times in development are teratogens most effective?
A. Blastocyst Stage B. Embryonic Period C. Fetal Period D. Gastrulation E. Two-Cell Stage
Biology & Microbiology