Suppose that a researcher is looking for met- strains of E. coli. She compares two plates. One plate has colonies growing on complete media. The other plate has colonies growing on methionine-deficient media. How can the researcher determine which colonies are met-?
a. by replica plating the plate with minimal media onto one with complete media
b. by streaking all individual colonies on minimal media
c. by replica plating the plate with complete media onto one with minimal media
d. by growing the bacteria in broth media that is complet
Answer: c. by replica plating the plate with complete media onto one with minimal media
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You are a genetic counselor, and a couple comes to you with concerns that if they have a child
together it could have hemophilia. The woman has an X-linked recessive form of hemophilia, but the man does not. Which of the following would be a correct thing to tell them?
a. Any child that they produce will have a 50% chance of having hemophilia. b. All of their male offspring will have hemophilia, and each of their female offspring will have a 50% chance of having hemophilia. c. None of their offspring should have hemophilia, but all of their female offspring will be carriers for hemophilia. d. Each of their male offspring will have a 50% chance of having hemophilia, and while their female offspring should not have hemophilia they will each have a 50% chance of being carriers. e. All of their male offspring will have hemophilia, and while their female offspring should not have hemophilia, they will all be carriers.
Upon Darwin's return from his voyage he spent time doing which of the following?
a. breeding dogs b. breeding pigeons c. breeding barnacles d. breeding goldfish e. breeding garden peas
Most transpiration occurs from the sea.
Answer the following statement true (T) or false (F)
Habituation can best be described as a form of _____.
A. fixed action B. learned behavior C. stereotyping D. instinctual response E. observational learning