Which of these is an example of a pheromone?
A) A dog urinating on a bush
B) A peacock's tail
C) Bird song
D) Light emitted by fireflies
E) The waggle dance of the honeybee
A
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A microbiologist inoculates Staphylococcus epidermidis and Escherichia coli into a culture medium. Following incubation, only the E. coli grows in the culture. What is the most likely explanation?
A. The microbiologist used too much inoculum. B. The culture medium was differential. C. The culture was contaminated. D. The incubation temperature was incorrect. E. The culture medium was selective.
Which of the following substances is secreted by an endocrine gland?
a. Tears b. Breast milk c. Wax d. Saliva e. Hormones
When new species move into a wide range of habitats during microevolution, it is known as ____
a. adaptive radiation b. natural selection c. genetic drift d. mass extinction e. minor extinction
If, during a process, the system becomes more ordered, then __________.
Fill in the blank(s) with the appropriate word(s).