Morphogenesis is characterized by
A. cells becoming specialized in structure and function.
B. cell division and growth in size.
C. body parts being shaped and patterned into a specific form.
D. All of the choices are correct.
E. None of the choices are correct.
Answer: C
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A) ease of cultivation B) rapid reproduction C) small size D) small genome
In humans, the blastocyst develops about ____ days after fertilization
a. 1 b. 3 c. 5 d. 7 e. 9
The greatest mass extinction of all time occurred at the end of the ____ era, in which more than 90% of all existing
marine organisms became extinct. a. Archaean b. Paleozoic c. Cenozoic d. Mesozoic e. Proterozoic
Which of the following are strategies with which vertebrate hosts counteract the asymmetries between most pathogens and their hosts?
a. somatic mutation and lateral gene transfer between immune system cells b. somatic recombination and restriction endonucleases c. somatic mutation and recombination d. rapid population growth of host organisms and clonal expansion