The buffering capacity of hemoglobin is directly related to its ability to bind with
A) oxygen.
B) carbon monoxide.
C) carbon dioxide.
D) hydrogen ions.
E) nitrogen.
Ans: D) hydrogen ions.
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Saber teeth found in different groups of extinct carnivorous mammals are considered ___________ structures, as the fossil record shows that saber teeth evolved independently among the groups.
Fill in the blank(s) with the appropriate word(s).
The amoeba E. histolytica is a pathogen that causes liver abscesses in infected individuals. Which of the following represents the most likely metabolic classification?
a. aerobic phototroph b. anaerobic heterotroph c. mixotroph d. phagocytic autotroph
What percent of all species that have existed
have gone extinct?
a. 10 b. 25 c. 55 d. 75 e. 99
The passageway that channels ova from the
ovary into the uterus is known as
a. a vagina. b. a uterus. c. an oviduct. d. the corpus luteum. e. all of these