Which of the following is a structural protein?
A) cellulose
B) collagen
C) hemoglobin
D) insulin
B
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In an age-sex pyramid for the United States (2000), the biggest cohorts in males and females is due to
A) the sexual revolution of the 1960s/70s and the end of the Vietnam War. B) large families between the two World Wars. C) the baby boom. D) the baby boom echo. E) the baby boom bust.
What factors are most important in evaluating earthquake hazards?
A. distances from plate boundaries and shorelines B. population density and number of faults C. earthquake size and depth
The total primary production of the world's oceans is determined more by the large seaweeds than it is by the single-celled microscopic phytoplankton.
Answer the following statement true (T) or false (F)
As a result of studying the relationship between animals and their surrounding plant communities, naturalists in the early 1900s began dividing Earth's life forms into abiotic associations
Indicate whether the statement is true or false