Rosalind Franklin created the first ____
a. clear x-ray diffraction image of DNA is it occurs in cells
b. model of DNA’s nucleotide bases
c. experiment to test whether base-pairs differ among species
d. hypothesis surrounding the nature of a hereditary molecule
e. results proving that bases exist on the outside of a helix
ANSWER: a
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Which plane divides the body into upper and lower portions?
a. sagittal b. frontal c. transverse d. midsagittal
A recent biology graduate was studying the evolution of a particular organism when she realized that she did not have enough data to determine the particular order of recent evolutionary events that formed her species. Given this information, how would you suggest she interpret her findings?
a. There must have been an increase in chromosome number in one of the species in her evolutionary tree. b. Perhaps there were several extinctions that confuse the order. c. It seems that her findings are the result of the process of adaptive radiation. d. A landscape change such as rising sea levels interrupted the evolutionary events occurring. e. The data indicate sympatric isolation.
Pea fowl (peacocks and peahens) show sexual dimorphism -- males have long blue-green tail feathers with eyespots, while females have short brown tail feathers. Which statement best describes the graphed data about peacocks? 
A. The fewer eyespots that a peacock has in his tail, the more mates he attracts. B. Actually eyespots have very little to do with mate-attracting activities. C. The more eyespots that a peacock has in his tail, the more mates he attracts. D. There are no peacocks with more than 165 eyespots. E. There are no peacocks with less than 140 eyespots.
The light reactions of photosynthesis occur in the __________.
Fill in the blank(s) with the appropriate word(s).