How is it possible for water to defy gravity and travel from the roots to the tops of plants? Use the tension-cohesion
model to explain your answer. What will be an ideal response?
Concepts to Consider: Evaporative pull of transpiration extends from leaves to stems and
roots, drawing water upward; water is pulled up in an unbroken column due to the cohesive
and adhesive properties of water.
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Which one of the following is least likely to cause mutations in DNA?
A) aflatoxins that are found in moldy grains B) hydroxyl radicals formed as by-products of aerobic respiration C) ultraviolet radiation from sunlight D) light from an incandescent bulb
Most meteors come from comets, but most meteorites come from asteroids. Explain this statement
What will be an ideal response?
Which of the following includes most of the bacteria that cause human disease?
a. chemoautotroph b. chemoheterotroph c. photoautotroph d. photoheterotroph e. chemoautotroph and photoheterotroph
If blood clotting doesn't occur correctly, what could happen?
A. Fluid would accumulate in the body. B. Formed elements and plasma would not remain in the blood. C. The blood pressure of the individuals would increase. D. Red blood cells would increase in concentration. E. The Ca2+ concentration in the blood would increase.