Which of the following is TRUE of all reptiles?
A) They have a heart with either three or four chambers.
B) They have four well-developed limbs.
C) They have teeth.
D) They are predatory carnivores.
E) They are exclusively terrestrial.
A
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Which of the following macromolecules are broken down by pepsin?
A. proteins B. carbohydrates C. lipids D. nucleic acids E. All of these answer options are correct.
Why is it believed that life cannot evolve on a planet that orbits a spectral type A, B, or O star?
a. These stars produce too much infrared radiation which would destroy carbon-based organisms. b. These stars have very small life zones. c. These stars are not capable of producing planets. d. These stars do not remain on the main sequence long enough for life to evolve. e. These stars take too long to form.
In which of the following cases will a Barr body be seen?
A) only XX B) XY C) XO D) only XXY E) both XX and XXY
What type of medium is used to demonstrate oxygen requirements of microbes?
A. Sulfite polymyxin sulfadiazine B. Blood agar C. Thioglycollate D. Sodium chloride