In bacterial cells, the electron transport system is located in the
A. cytoplasm.
B. ribosomes.
C. cell membrane.
D. chloroplasts.
E. mitochondria.
Answer: C
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What happens during Anaphase B?
A. Kinetochores are pulled toward the poles. B. The spindle poles move apart. C. The spindle apparatus disassembles. D. The nuclear envelope reforms. E. The APC/C gets activated for the first time.
Oral contraceptives work by _____
a. changing the pH of the uterus so sperm cannot live b. changing the temperature of the uterus so sperm cannot live c. blocking the entrance to the uterus d. killing sperm e. preventing ovulation
Assume that a Chi-square test was conducted to test the goodness of fit to a 3:1 ratio and that a Chi-square value of 2.62 was obtained
Should the null hypothesis be accepted? How many degrees of freedom would be associated with this test of significance?
Being born with extra fingers on a hand is called polydactyly. This is more common in some populations in North America than others due to ________.
A. random mating with other populations in North America B. natural selection in favor of extra fingers in these populations C. a founder effect because their ancestors from Europe carried the alleles D. migration of people with multiple fingers out of the population E. an increase in mutation rate in these populations