Which property is true of living things?
a. They are stable over time.
b. They are stable over many generations.
c. They use protein as their hereditary material.
d. They must obtain all organic molecules of life from external sources.
e. They consist of one or more cells.
ANSWER: e
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Grassland expansion is associated with which of the following variables?
A. increased rainfall and decreased atmospheric CO2 B. increased rainfall and increased atmospheric CO2 C. decreased rainfall and decreased atmospheric CO2 D. decreased rainfall and increased atmospheric CO2 E. increased CO2 and increased sunlight availability
All of the following are hydrophytes except:
a. turtle grass. b. Zostera. c. surf grass. d. cordgrass.
A tRNA that carries a specific amino acid enters the protein-synthesizing machinery at the ribosomes and pairs with the appropriate
A) anticodon. B) codon. C) amino acid. D) charge.
Although all of the following microbes are of serious concern, which one is ranked as urgent on the CDC's list of top drug-resistant pathogens?
A) Candida B) Clostridium C) Mycobacterium D) Campylobacter E) Pseudomonas