What does the ABC model of flower development attempt to explain?
A) how different combinations of gene products trigger the formation of different floral organs
B) why petals are found on the inside of the whorl of sepals instead of on the outside
C) why the four types of floral organs occur in whorls
D) why apical meristems are converted to floral meristems in response to specific cell-to-cell signals
Answer: A
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Of the biomes listed, which is best adapted to seasonal fires?
A. Chaparral B. Tundra C. Broadleaf forests D. Coniferous forests
In a typical application, a DNA microarray is used to compare the ____________________
a. expression of genes in two different tissues b. alleles of each chromosome c. length of DNA fragments in yeast vectors d. changes in gene sequences within an allele through generations of a single family e. protein products produced when using different DNA sequencing techniques
When processing a culture swab in the diagnostic laboratory the microbiologist should:
a. inoculate the media prior to making the direct smear. b. roll the swab back and forth on the slide making sure to transfer organisms. c. prepare the smear by rubbing the slide with one side of the swab and utilize the opposite slide to inoculate media. d. cancel the direct Gram stain and only set up the media. Request a second swab for the direct smear.
A good sampling method for quantifying the density of birds or bats is the use of
A. line transects. B. quadrats. C. pitfall traps. D. baited live traps. E. mist nets.