Temperature is perhaps the most important factor in the distribution of organisms because
A. water is more scarce in warmer environments.
B. most organisms are unable to regulate their body temperature precisely.
C. many organisms are able to grow faster in warmer climates.
D. the metabolic optimum for endothermic animals is in temperate areas.
E. wind amplifies the effect of cool temperatures.
B. most organisms are unable to regulate their body temperature precisely.
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An infected intravenous (IV) catheter tip grew out gram-positive cocci, which were catalase positive and coagulase negative. The zone size of the novobiocin disk measured 18 mm. The most likely organism causing infection is:
a. S. saprophyticus. b. S. epidermidis. c. S. hominis. d. S. cohnii.
What hallmark of angiosperms is found in some gymnosperms and why does it not result in this
gymnosperm group giving rise to angiosperms?
What will be an ideal response?Which of the following is NOT true of the
effects of UV light on DNA?
a. it breaks DNA into pieces b. it causes kinks in the DNA molecule c. it causes the formation of nucleotide dimers d. it causes covalent bond formation between adjacent thymines e. it causes permanent mutations
Which one of the following statements is TRUE regarding bone?
A) The epiphysis of a long bone is filled with yellow bone marrow. B) Bone is not considered to be a living tissue because it does not contain cells or blood vessels. C) Dense compact bone is located in the center of a long bone. D) Stem cells responsible for the production of blood cells are located in red bone marrow. E) The outer surface of a bone is covered with loose connective tissue.