When two genes on the same chromosome are located 10 map units from each other, ____ of the
offspring from a testcross for genetic linkage should have a recombinant phenotype.
a. over 75%
b. about 50%
c. about 25%
d. about 10%
e. about 5%
D
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Which of the following is not a correct pairing of tooth type and function?
A. incisors: piercing B. canines: ripping and tearing C. premolars: shearing D. molars: grinding E. All of the answer options are correct pairings.
Compared to cnidarians, bilaterally symmetrical animals have _____ nervous systems
A. simple B. compound C. specialized D. no
The main function of villi and microvilli in the small intestine is to ________
a. all of the choices b. secrete bile salts c. increase surface area for absorption d. produce vitamins
Despite advances in microscopy during the late 1800s and early 1900s, experiments using bacteria as test subjects required careful precautions to prevent contamination that would have invalidated results. What advantage did bacteria have over other, larger organisms that could be used as test subjects, such as mice and pea plants?
a. Larger organisms used as test subjects are more susceptible to injury and disease. b. Bacteria do not require specialized equipment to be stored and transported like other test subjects. c. Bacteria reproduce rapidly, allowing experiments to be conducted and repeated more often. d. Unlike mice and pea plants, bacteria can be frozen for display without cellular damage.