The movement of sugars in a plant can be explained by
a) capillary action.
b) transpiration pull.
c) the pressure-flow hypothesis.
d) root pressure.
Answer: c) the pressure-flow hypothesis.
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Cystic fibrosis is one of the most common genetic diseases among individuals of European ancestry, and affects one newborn in approximately how many?
A) 10 B) 100 C) 250 D) 2,500 E) 10,000
Which of the following statements about the development of bone in humans is NOT true?
A. Bone breakdown and replacement occur throughout life. B. A primary ossification center forms in the middle of a long bone. C. A secondary ossification center forms at the end of a long bone. D. A cartilaginous disk remains between the primary and secondary ossification centers until old age. E. Bones may form within a cartilage model or within a membrane matrix.
Antibiotics stop working effectively when antibiotic resistance occurs. Which of the following does not contribute to an increase in antibiotic resistance?
A) taking antibiotics for viral diseases B) increase of good bacteria in the body C) stopping antibiotics as soon as you feel better D) antibiotics in animal feed
Four of the five answers listed below possess chloroplasts. Select the exception
a. mesophyll cells b. guard cells c. sclereid cells d. palisade cells e. spongy cells