What is evolution that occurs as a result of chance events?
A) sexual selection
B) genetic drift
C) gene flow
D) population bottleneck
B
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Which of the following is more likely to cause urinary tract infections?
A) fimbriated strains of Escherichia coli B) non-fimbriated strains of Escherichia coli C) both fimbriated and non-fimbriated strains of Escherichia coli D) None of the answers are correct.
If the blood brain barrier prevents toxic substances from getting into the central nervous system, how does alcohol
most likely impair a person's judgment?
a. alcohol acts on the peripheral nervous system, which then activates neurons in the cortex that impair judgment b. alcohol acts on the liver, creating toxins that can cross the blood brain barrier, which then activate neurons in the cortex that impair judgment
c. alcohol decreases blood oxygen levels, which leads to impaired judgment d. alcohol can bind to glucocorticoid transporters in the brain, which causes impaired judgment by binding to neurons in the cortex e. because it is hydrophobic, alcohol can pass directly across the blood brain barrier and cause impaired judgment by binding directly to neurons in the cortex
Leaf characteristics are useful indicators of the trade-offs plants make to combat environmental constraints
Indicate whether the statement is true or false
Angiosperms are referred to as ________ when the male and female reproductive parts are on different individuals of the same species.
A. monoecious B. tetraploid C. bryophytes D. dioecious