A homeowner uses a nail to hang a "Home Sweet Home" sign on the trunk of an oak tree. The sign is 2 meters above the ground. The tree grows in height at a rate of 10 cm per year. How high above the ground will the sign be in 15 years?
A) 1.5 meters
B) 2 meters
C) 3.5 meters
D) 152 meters
B
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If a human red blood cell takes the shortest possible route from the right ventricle to the right atrium, then it must travel through this number of capillary beds.
A. one B. two C. three D. four E. five
Which of the following is an advantage of sexual reproduction?
a. decreased genetic diversity b. increased genetic diversity c. decreased sexual selection d. increased sexual selection
Which of the following statements concerning the type of support illustrated in Figure 40-2 is false?
a. It is flexible. b. It can be found in cnidarians. c. It demonstrates cells working in an antagonistic fashion. d. It it absent in vertebrates that have an endoskeleton. e. It is dependent on fluids being noncompressible.
Which structure acts like a motor for the bacterial flagellum?
a. hook b. capsule c. filament d. basal body
e. protein rings