Meerkats are small desert mammals that live in groups of 20–50 animals. You observe one meerkat standing upright on a stump, looking around, while other meerkats forage for food. You hypothesize that this is an altruistic behavior
What additional data would support your
hypothesis?
A. The meerkat who is looking around has
already finished eating.
B. The meerkat who is looking around is a
male who later mates with a female, while
other males do not.
C. The meerkat who is looking around dives
into a burrow when he spots a predator.
D. The meerkat who is looking around
forages for food after another group member
takes his "post."
E. The meerkat who is looking around runs
off after a few minutes to a new foraging
area.
D
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Chromatography is frequently used to purify proteins from cellular extracts. There are various strategies that can be used, depending on the tools and reagents available
You are interested in isolating additional proteins that interact with your protein target, but your labmates have used all the purified protein stocks. A. Why would you need purified target protein to do this experiment? B. What other strategies/tools could you use to carry out the affinity chromatography? C. What are the limitations to the method you described in part B that would not be a concern if you could use the purified protein directly?
Based on the experimental design, which variable was the dependent variable?
A. Germination rate B. Type of light C. Seeds in the dark D. Moisture E. Temperature
Transcription factors bind to _____
a. promoters b. stop codons c. start codons d. poly-A tails e. introns