A culture medium on which only salt tolerant Gram-positive organisms grow and the colonies are a mixture of pink and yellow is called a(n):
a. Selective medium
b. Differential medium
c. Enriched medium
d. a and b
e. b and c
Ans: d. a and b
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A paleontologist has recovered a bit of tissue from the 400-year-old preserved skin of an extinct dodo (a bird). To compare a specific region of the DNA from the sample with DNA from living birds, which of the following would be most useful for increasing
the amount of dodo DNA available for testing? A) RFLP analysis B) polymerase chain reaction (PCR) C) electroporation D) gel electrophoresis E) Southern blotting
The secretion of tears, milk, sweat, and saliva are functions of what tissue?
a. epithelial b. loose connective c. lymphoid d. nervous e. adipose
Circulation developed due to which of the following?
a. Animals got larger. b. Segmentation allows increasing specialization of body parts. c. The development of a complete digestive tract allows the specialization of regions to carry out a variety of functions. d. Circulatory systems allow more efficient transfer of materials and gave an advantage to the animals that developed them. e. None of these are true.
Scaffold proteins organize groups of intracellular signaling kinases into signaling complexes
__________________ Indicate whether the statement is true or false.