In addition to a vertebral column, all vertebrates have
A. scales.
B. gills.
C. an open circulatory system.
D. a tunic.
E. a distinctive head or skull.
Answer: E
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An acoelomate is an animal that:
A. has a coelom B. has a pseudocoelom C. has both a coelom and a pseudocoelom D. has neither a coelom nor a pseudocoelom E. has a coelom during early development but later loses it
Which of the following structures becomes
part of the placenta?
a. chorion b. amnion c. blastocoel d. yolk sac e. more than one of these becomes part of the placenta
Similar orders are placed in the same class
__________________ Indicate whether the statement is true or false.
____ are accessory pigments in photosynthesis that reflect blue and red wavelengths best.
A. Carotenoids B. Phycobilins C. Anthocyanins D. Chlorophyll b E. Chlorophyll a