Which type of cell structure is the nucleolus organizer (NOR) responsible for producing?
What will be an ideal response?
ribosome
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The purple sulfur and green sulfur bacteria
A. both use hydrogen sulfide as a source of electrons. B. generate oxygen. C. preferentially use organic molecules as an electron source. D. both lack gas vesicles.
Triglycerides contain:
a. fatty acids only b. phosphate only c. glycerol only d. fatty acids and phosphate e. glycerol and fatty acids
Desiccation is the process of drying out due to the effects of sunlight and wind
Indicate whether the statement is true or false
Which of the following occurs during human inhalation?
a. The diaphragm contracts and the external intercostal muscles relax. b. The diaphragm relaxes and the external intercostal muscles contract. c. The diaphragm contracts and the external intercostal muscles contract. d. The diaphragm relaxes and the external intercostal muscles relax. e. The diaphragm expands and increases oxygen uptake.