Megapode birds, such as the brush turkey, bury their eggs in soil as crocodilians do rather than brooding them in a nest like other birds
How could you determine whether this mode of incubation is a retained ancestral trait or a derived condition that happens to have reverted to the crocodilian mode?
Megapodes are members of the order Galliformes, which includes chickens, pheasants, quail, and grouse among others (see Table 17?1). The Galliformes is a derived clade within the Neornithes, and the hypothesis that megapodes alone retained the ancestral mode of incubation while all of the lineages that lie between coelurosaurs and megapodes lost that trait is not plausible. The megapode method of incubation is best regarded as a derived character.
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The typical value of water losses and gains each day is
A) 500 mL. B) 1000 mL. C) 1500 mL. D) 2000 mL. E) 2500 mL.
A muscle group that works with and assists the action of a prime mover is a(n) ________.
A) antagonist B) fixator C) synergist D) protagonist
The tension produced in a muscle fiber is directly proportional to the number of ________ formed.
Fill in the blank(s) with the appropriate word(s).
What is the function of mucus in the stomach?
A. Partially breaks down lipids B. Allows vitamin B12 to be absorbed C. Destroys bacteria D. Protects the stomach walls