If the actual results most closely resembled those in part (A) in the figure above, then a further question arising from these data is:
"Do the Dawsonia rhizoids have to be alive to reduce soil nitrogen loss, or do dead rhizoids have the same effect?" Arrange the following steps in the correct sequence to test this hypothesis.
1. Add metabolic poison to the soil of the experimental plot of mosses.
2. Apply water equally to the experimental and control plots.
3. Measure initial soil nitrogen contents of control and experimental plots.
4. Determine nitrogen loss from soil of control and experimental plots.
5. Establish two identical plots of Dawsonia mosses; one as a control, the other as the experimental treatment.
A) 5 ? 1 ? 3 ? 2 ? 4
B) 5 ? 2 ? 3 ?? 1 ? 4
C) 5 ? 3 ? 1 ?? 2 ? 4
D) 4 ? 5 ? 1 ? 3 ?? 2
E) 5 ? 3 ? 2 ?? 1 ? 4
Answer: C
You might also like to view...
The ____ component of the cell membrane functions as a selective barrier, while the ____ component
has specific functions such as transport, recognizing other cells, and binding to other cells.
a. carbohydrate, nucleic acid b. protein, lipid c. lipid, protein d. lipid, carbohydrate e. carbohydrate, protein
Which model of evolution is closest to what was originally suggested by Charles Darwin?
A. The graduated model matches best the reasoning of Charles Darwin. B. The punctuated equilibrium model matches best the reasoning of Charles Darwin. C. Neither the punctuated equilibrium model nor the graduated model match the original reasoning of Charles Darwin. D. Both the punctuated equilibrium model and the graduated model match the original reasoning of Charles Darwin.
The Punnett square is a useful tool for
A) determining the rate of segregation of alleles. B) calculating how many mutations occur during DNA replication. C) determining which genes or traits assort independently during gamete formation. D) predicting the ratios of possible genotypes of a particular combination of alleles. E) predicting the level of crossing over that will occur during meiosis.
You discover in a study of a group of five fossil taxa with spines that the mean spine length has increased over time. When you tabulate mean spine lengths for each taxon over time, you obtain the following table. X = Taxon has become extinct
Time interval Taxon 1 Taxon 2 Taxon 3 Taxon 4 Taxon 5 245–214 MYA 2.3 7.0 1.4 5.6 4.8 215–184 MYA 2.4 6.9 1.5 5.4 4.6 185–154 MYA 2.2 7.1 1.3 5.3 4.7 155–124 MYA X 7.2 1.5 5.5 4.9 125–94 MYA X 7.0 X 5.7 4.6 95–65 MYA X 6.8 X 5.6 X What kind of process is underlying this active evolutionary trend? What will be an ideal response?