Sickle cell disease is a caused by a mutation that ________
A) affects lipids
B) causes abnormal hemoglobin structure
C) causes excess mucus
D) causes blindness and retardation
E) can be diagnosed by using a karyotype
B
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A vesicle can be best compared to a:
A. micelle. B. lipid raft. C. liposome. D. bilayer.
Active transport ________.
utilizes energy cannot transport molecules against a concentration gradient cannot be saturated requires cofactors
Postzygotic isolation barriers prevent
A. a hybrid embryo from developing into a fertile adult. B. fertilization. C. male gametes from joining with female gametes. D. All answers are correct. E. formation of gametes by one of the parents.
In a human population with a high proportion of prereproductive individuals, the population will:a
continue to increase even if the fertility rate is at replacement levels.
b. decline even if the fertility rate is at replacement levels. c. increase only if the fertility rate is above replacement levels. d. decline only if the replacement level fertility rate changes. e. reach ZPG sooner than with a low proportion of prereproductive individuals.