Which of the following represents the activation energy required for a noncatalyzed reaction in the figure?
A) a
B) b
C) c
D) d
E) e
Answer: C
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Which of the following are present in plant cells, but not animal cells?
a. cell walls, central vacuole, plastids b. cell walls, central vacuole, mitochondria c. central vacuole, lysosomes, mitochondria d. plastids, cell walls, Golgi complex
Members of the ____ subphylum, including spiders, ticks, mites, scorpions, and horseshoe crabs,have fanglike
appendages used for biting prey and pedipalps used as grasping organs, sensory organs, or walking legs.
a. Myriapoda b. Trilobita c. Chelicerata d. Hexapoda e. Crustacea
An organic nutrient that cannot be synthesized by the organism and must be provided is called a(n) ________.
A. element B. macronutrient C. growth factor D. compound E. trace element
Adaptive radiation would be described by:
a. the dinosaurs going extinct. b. coelecanths. c. Darwin’s finches. d. rats and warfarin. e. all of these.