When comparing the levelized costs of renewable and non-renewable sources of energy, which renewable energy is most cost-competitive?
A. Solar
B. Biomass
C. Natural gas
D. Wind power
E. Geothermal
Ans: D. Wind power
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The dominant stage in the life cycle of tracheophyte plants is the
A. angiosperm generation. B. sporophyte generation. C. spore generation. D. epiphyte generation. E. gametophyte generation.
Which statement is false?
A. A molecule must be made of at least two atoms. B. Compounds are made of elements. C. Two atoms of oxygen make a molecule of oxygen. D. Chemical bonds form between molecules of solute and solvent. E. Elements are found in compounds and molecules.
The nuclear envelope is perforated with openings called nuclear ________ that regulate the movement of molecules through the envelope.
Fill in the blank(s) with the appropriate word(s).
Individuals that are heavy smokers may eventually have trouble clearing the mucous from their lungs because the structures that move fluid along the epithelial lining of the lung become damaged over time. What are these structures called?
A. cilia B. flagella C. pili D. cell walls