Using the natural processes of cell growth and development to replace diseased or damaged tissue is called:
A. cloning.
B. stem cell transplantation.
C. genetic engineering.
D. regenerative medicine.
E. stem cell therapy.
D
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Researchers find a group of crocodiles in which an expanded incubation temperature gives rise to male crocodiles. This particular group of crocodiles hatch male crocodiles even with incubation temperatures as low as 29 ?C. What type of scientific approach has led to this observation?
A. Discovery-based science. B. Hypothesis testing.
Which of the following must occur in order for light to be used by an organism?
a. The light must be transmitted. b. The light must be absorbed. c. The light must be transferred. d. The light must be reflected.
Which of these definitions of species best matches the biological species concept?
A) Members of the same species are whatever an expert says they are. B) Members of the same species are all genetically identical. C) Members of the same species are all morphologically similar. D) Members of the same species look almost exactly alike. E) Members of the same species can mate and produce fertile offspring.
Which of the following undergoes meiosis during the development of pollen grains?
A) Megaspore B) Generative nucleus C) Microspore D) Microspore mother cell E) Megaspore mother cell