What major feature allows primates to grasp objects?
a. jointed appendages
b. an opposable thumb
c. an enlarged foramen magnum
d. a forelimb with four digits
e. a large brain
B
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The bacteriocins produced by Escherichia coli are called colicins.
Answer the following statement true (T) or false (F)
What is it hypothesized that the earliest known
cells used for producing energy?
a. iron oxide b. oxygen gas c. carbon dioxide d. water vapor e. iron sulfide
The portion of the molecule in Figure 13-2 that contains the anticodon is:
a. 1.
b. 2.
c. 3.
d. 4.
e. 5.
Small birds must eat more frequently than large birds in order to maintain their body temperature. This is because:
A. large birds are cold-blooded. B. small birds are cold-blooded. C. small birds have a lower surface area to volume ratio than large birds. D. small birds have a higher surface area to volume ratio than large birds.