A physiologist is a biologist who studies the ________
A) structure of living things
B) structure of body parts
C) evolution of animals
D) function of body parts
D
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A recent biology graduate was studying the evolution of a particular organism when she realized that she did not have enough data to determine the particular order of recent evolutionary events that formed her species. Given this information, how would you suggest she interpret her findings?
a. There must have been an increase in chromosome number in one of the species in her evolutionary tree. b. Perhaps there were several extinctions that confuse the order. c. It seems that her findings are the result of the process of adaptive radiation. d. A landscape change such as rising sea levels interrupted the evolutionary events occurring. e. The data indicate sympatric isolation.
Which bacterial groups have a gram- positive cell wall?
a. actinobacteria b. firmicutes c. both actinobacteria and firmicutes d. proteobacteria
Suppose you have two departments and have daily data on complaints and number of products they oversee for the departments over two years. In the second year, you increased the number of products under the scope of department #2 by 10. To estimate the effect of this increase in the number of products, you estimate the following regression: Complaintsit = ? + ?1 × Department #2it + ?2 × Year2it + ?3 × Department #2it × Year2it + Uit. In this regression, what is the "diff-in-diff"?
A. ? + ?3 B. ?3 C. ? + ?1 D. ?1 + ?3
Which of the following is true of steroids?
A) Steroids are polymers. B) If people inject male steroid hormones, they can build muscle mass with no side effects. C) Some amino acids are steroids. D) Steroids exist naturally in humans as hormones. E) Steroids contain a central, single-ring carbon structure.