In a closed circulatory system, transfers between blood and the cells of other tissues take place across:
a. capillaries
b. veins
c. arteries
d. lymph vessels
e. all blood vessels
a
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In looking at the species—area plot in the figure above, what can be concluded?
A) Number of bird species increases linearly with island area. B) Number of bird species remains the same on these various islands. C) Diversity is independent from island area. D) Number of bird species increases exponentially with island area.
Which of the following traits do ammonia and nitrite oxidizers share?
A) chemoorganotrophic B) autotrophic C) aerobic D) autotrophic and aerobic
What is the main form of nitrogen found on Earth?
A) N2 B) NO C) NO3- D) NH4
Which of the following are components of Chargaff's rules of bases?
A) % purines = % pyrimidines B) %C + %T = %A + %G C) %A = %T D) %G = %C E) All of these are true.