The type of adhesive junction that connects epithelial cells to the basal lamina is a
A) hemidesmosome.
B) desmosome.
C) gap junction.
D) tight junction.
E) focal contact.
Answer: A
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Which of the following reactions prevails in red blood cells traveling through alveolar capillaries? (Hb = hemoglobin)
A) Hb + 4 O2 ? Hb(O2)4 B) Hb(O2)4 ? Hb + 4 O2 C) CO2 + H2O ? H2CO3 D) H2CO3 ? H+ + HCO3- E) Hb + 4 CO2 ? Hb(CO2)4
How do phosphates from the oceans reach rivers and lakes?
a. Phosphates dissolved in evaporated sea water precipitate over lakes and rivers. b. Phosphates form sedimentary rocks that are then uplifted by tectonic activity. c. Phosphates from animal bones collect in rivers and lakes where they slowly dissolve. d. Phosphate-rich sediment from the ocean floor is carried inland by hurricanes and tropical storms.
Which color of light has the least important role in photosynthesis?
a. red b. green c. blue d. orange e. yellow
Herbivory is an example of a ________ interaction
A) +/+ B) -/- C) 0/+ D) +/-