Linda discovered a virus new to humans and called it Zeta 1. Which other of the animals on this list is most likely to be infected with it too?
A) orangutan
B) mouse
C) potto
D) kangaroo
A
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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 ____.
Embryonic stem cells have the ability to become any cell type of the body. This capacity is termed:
a. differentiation b. multidirectional c. undifferentiated d. pluripotency e. genetically undefined
Which of the following is characteristic of animals?
a. heterotrophy. b. autotrophy. c. photosynthesis. d. both b and c.
In 2009, which of the following did scientists discover was possible on early Earth?
A. gram-positive bacteria with outer membranes that contain lipopolysaccharides B. abiotic synthesis of RNA monomers C. gram-negative bacteria with cell walls composed of a thick layer of peptidoglycan D. bacterial cell walls made mainly of chitin