Each step in the food chain is called a ________
A) rung
B) phylum
C) ecological order
D) trophic level
E) environmental determinant
Answer: D
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The total number of cataloged species on Earth in both marine and terrestrial environments is currently 1.8 ________
A) thousand B) million C) billion D) trillion E) quadrillion
The most frequent time of day for tornadoes to form is in the ____
a. early morning just after sunrise b. late morning just before noon c. evening just after sunset d. late afternoon e. middle of the night
Most people do their own personal risk assessments based upon
A. Scientific data B. Logical reasoning about relative risks C. Personal biases and preferences as well as logic D. Whimsical preference devoid of logic E. Statistical probabilities
In which of the following regions do continental tropical air masses typically occur?
A. northern Mexico and eastern Canada B. the Gulf of Mexico and the southeastern United States C. northern Mexico and the southwestern United States D. the Gulf of Mexico and the southwestern United States