What factors can increase human susceptibility to cancer?
a. exposure to hormones
b. carcinogens
c. smoking
d. unprotected sex
e. all of the above
Ans: e. all of the above
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Which of the following refers to a paired cross in which the respective traits of the male and female in one cross become the respective traits of the female and male in the other cross?
a. reciprocal cross b. test cross c. dihybrid cross d. monohybrid cross
What is the proper way to write a species name?
a. Pantera b. Pantera Leo c. Pantera leo d. pantera Leo e. pantera leo
You have a concentrated stock solution of 10 M NaOH and want to use it to produce a 150 mL solution of 3 M NaOH. What volume of water and stock solutions will you measure out to make this new solution?
(a) 135 mL of water, 15 mL of NaOH stock (b) 115 mL of water, 35 mL of NaOH stock (c) 100 mL of water, 50 mL of NaOH stock (d) 105 mL of water, 45 mL of NaOH stock
Indicate whetherthe statements below are true or false. If a statement is false, explain why it is false
A. Neurotransmitters are small molecules released into the synaptic cleft after the fusion of synaptic vesicles with the presynaptic membrane. B. Action potentials are usually mediated by voltage-gated Ca2+ channels. C. Voltage-gated Na+ channels become automatically inactivated shortly after opening, which ensures that the action potential cannot move backward along the axon. D. Voltage-gated K+ channels also open immediately in response to local depolarization, reducing the magnitude of the action potential.