The atomic number denotes the number of ____ in an atom of a particular element
a. electrons
b. neutrons
c. energy levels
d. protons
e. isotopes
ANSWER: d
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The yellow zone in the tropical middle intertidal owes its color to:
a. sponges. b. boring algae. c. barnacles. d. limpets. e. crabs.
Weightlifters, bodybuilders, and other athletes who require rapid bursts of high-energy muscle output often spend a lot of money on dietary supplements
Some supplements, such as amino acids, are used as building blocks to make more high-protein muscle cells. Other supplements increase energy or provide more endurance during workouts. For example, supplements that contain creatine (often sold as creatine diphosphate) are reputed to provide more energy. Based on this information and your knowledge of muscle physiology, would you expect creatine supplements to provide extra energy? Why or why not? A) No, because the digestive system breaks creatine (a large protein macromolecule) down before it can be used by the body. B) Yes, because creatine is used directly as a source of energy by muscle cells. C) No, because creatine is not used for energy production in the body. D) Yes, because the creatine supplement can donate phosphate ions to regenerate ATP.
Some members of the alphaproteobacteria produce a structure called a (filament/prostheca/pilus) to produce extra surface area for nutrient absorption
What will be an ideal response?
Which of the following terms best describe cloudy growth in a broth culture?
A) Turbidity B) Colony C) Pellicle D) Precipitate E) Spore