Large, flightless birds called __________ were exterminated from New Zealand by Maori natives before Europeans arrived.
A) dugongs
B) dodos
C) moas
D) boas
Ans: C) moas
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Your friend wants to know why birds such as boobies and birds of paradise have elaborate mating rituals. You explain that:
1.Behavioral rituals are a way to keep a bird from breeding with the wrong species, since the rituals are specific to each species. 2.Birds are social and need a way to attract a mate. 3.Birds have evolved mating rituals as methods to display their elaborate and beautiful plumage. 4.Mating rituals have evolved to keep males from mating with more than one female.
All but which factor were important evolutionary adaptations in primates?
a. enhanced stereoscopic vision b. upright position c. an opposable thumb d. the development of a restricted or specialized diet e. brain expansion and elaboration
Which structure marks the ends of a sarcomere?
a. cell b. myofibril c. Z line d. actin e. myosin
Animals with the kind of body cavity that forms between the endoderm and mesoderm, such as nematodes, are called
A. semicoelomates. B. acoelomates. C. pseudocoelomates. D. coelomates.