Which of the following best compares microevolution with macroevolution?
a. Microevolution describes the small-scale evolutionary changes that populations undergo. Macroevolution describes larger-scale genetic changes observed in species.
b. Microevolution describes the large-scale genetic changes that populations undergo. Macroevolution describes small-scale evolutionary changes observed in species.
c. Microevolution describes the small-scale genetic changes that populations undergo. Macroevolution describes larger-scale evolutionary changes observed in species.
d. Microevolution describes the small-scale genetic changes that species undergo. Macroevolution describes larger-scale evolutionary changes observed in populations.
Answer: c. Microevolution describes the small-scale genetic changes that populations undergo. Macroevolution describes larger-scale evolutionary changes observed in species.
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Which of the following statements comparing endotherms and ectotherms is correct?
A) Mitochondrial density and enzyme activity are 3-4 times higher in the cells of ectotherms than in the cells of endotherms of similar size. B) Endotherms can use more of their energy intake for reproduction than ectotherms can. C) Endotherms and ectotherms have about the same mass-specific metabolic rate. D) Both endotherms and ectotherms exchange heat with the environment through convection, conduction, radiation, and evaporation.
Selection of culture media for specific specimens includes a variety of media for all of the following reasons except:
a. a nutritive media is included to insure growth of all potential pathogens. b. a selective media is often included to sup-press normal microbiota or other potential contaminating organisms. c. as enrichment media is utilized to cultivate organisms that do not grow on routine media. d. a back-up broth is included to provide in-oculum for additional testing.
In some plants, companion cells become modified into phloem cells that facilitate the short-distance
transport of various organic solutes from the symplast into the apoplast.
Indicate whether the statement is true or false.What sugar is found in DNA nucleotides?
What will be an ideal response?