Ecstasy Dr. Goddard is studying the behavioral effects of MDMA (Ecstasy) using a rat model. Dr. Goddard observes a change in rat behavior that he likens to ____.
Ans: bond formation
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Which one of the following statements is true of the 32 allele in the CCR5 gene? (Choose all that apply)
A. It codes for a mutant protein that is completely inactive. B. It leads to a deletion which maintains the reading frame. C. It provides some protection against HIV progression to AIDS in both its heterozygous and homozygous forms. D. It is an example of a beneficial mutation. E. It affects the attachment of HIV to an animal cell by altering one of the viral proteins.
Which of the following is a characteristic of an adult tunicate?
a. pharyngeal slits b. notochord c. post-anal tail d. dorsal hollow nerve cord
An adventitious root is indicated by
a. A. b. B. c. C. d. B and C. e. none of these.
All the offspring of a cross between a black-eyed MendAlien and an orange-eyed MendAlien have black eyes. This means that the allele for black eyes is ________ the allele for orange eyes.
A) codominant to B) recessive to C) more aggressive than D) dominant to E) better than