A rare genetic disorder called Gaucher disease may strike as many as one in 450 people of ____ descent
a. Middle Eastern
b. Western European
c. African American
d. British
e. Eastern European
e
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All of the following statements about exoskeletons are correct EXCEPT
A. exoskeletons are made of chitin. B. muscles are attached to the exoskeleton. C. exoskeletons do not limit growth because they can stretch. D. exoskeletons are shed by many arthropods in a process called molting. E. chitin is a polysaccharide.
Which of the following occurs in cells of human individuals with three or more X chromosomes?
a. Two X chromosomes remain active, and all others are inactivated. b. One X chromosome remains active, and the rest are inactivated. c. All of the X chromosomes remain active. d. Two X chromosomes remain active in females and one remains active in males; the rest are inactivated.
Which of these biotechnologies involves the process of nuclear transfer?
A) cloning B) recombinant DNA C) genomics D) selective breeding
What distinguishes the mycoplasmas from others within Bacteria?
a. large size b. contain lipoteichoic acids c. lack of cell wall d. all of the above