Which of the following is an example of vertical transmission?
A. a sneeze transmitting a cold
B. a mother transmitting syphilis to her fetus
C. oral-fecal transmission involving a diaper
D. drinking contaminated water
E. a mosquito bite
Answer: B
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An oncogene may promote cancer by keeping the cell growth pathway in the off position
Indicate whether the statement is true or false
Barr bodies will
A. be formed in females only. B. be formed in males only. C. be formed in both males and females, depending on the number of X chromosomes possessed by an individual. D. cause an increased production of X-linked gene products. E. inactivate Xic on autosomes.
Why does sweating cool your body?
A) The water in sweat, as it is secreted from skin glands, is cooler than your body temperature. B) Heat energy from your skin is used to evaporate the water in the sweat. C) Water in sweat contains hydrogen bonds that react with skin cells and removes excess heat from the skin. D) Sweat contains a combination of chemicals that react with salt on the skin to create a heat-absorbing substance.
Which of the following samples would require the largest volume of water to arrive at a statistically significant result from the Membrane Filtration Method?
A) Pond water B) Water from a drinking fountain C) Bottled water