Animals that have only a single body opening that serves as both mouth and anus include
A. cnidarians and flatworms.
B. cnidarians and sponges.
C. cnidarians, flatworms, and roundworms.
D. cnidarians only.
Answer: A
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Which of the following human activities is thought to be directly linked to why the damage from Hurricane Katrina was so devastating to the city of New Orleans?
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a. three-sided (trigonal) b. four-sided (tetragonal) c. five-sided (pentagonal) d. six-sided (hexagonal) e. eight-sided (octagonal)
Assume a warm air parcel, at sea level, has a temperature of 21°C (70°F) and begins to rise upward
Assume it becomes saturated at 1000 m (3300 ft) altitude, and continues to rise to 2000 m (6600 ft.) altitude. What would the approximate temperature of the parcel be at an elevation of 2000 m (6600 ft.)? A) 9°C (48.2°F) B) 1°C (33.7°F) C) 8.6°C (22.4°F) D) 5°C (46.4°F) E) 8.2°C (46.9°F)
Of the following, which group is most vulnerable to anthropogenic changes?
A) birds B) fish C) plants D) amphibians E) mammals