Refer to the Following Information to Answer the Next Few

question 7

Multiple Choice

Refer to the following information to answer the next few questions.
Researchers decided to test the hypothesis that if the 2-m tall Polytrichum gametophyte- sporophyte plants had acted as a physical buffer, then they would have reduced water's ability to erode the soil and carry away its nitrogen. They began with four equal-sized areas where Polytrichum mosses grew to a height of 2 m above the soil surface. One of the four areas was not modified. In the second area, the mosses were trimmed to a height of 1 m above the soil surface. In the third area, the mosses were trimmed to a height of 0.5 m above the soil surface. In the fourth area, the mosses were trimmed all the way to the ground, leaving only the rhizoids. Water, simulating rainfall, was then added in a controlled fashion to all plots over the course of one year. The figure below presents four graphs that depict potential results of this experiment.

-If the actual results most closely resembled those in part (A) of the figure, then a further question arising from these data is: "Do the Polytrichum rhizoids have to be alive in order 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 Polytrichum 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

Understand the flowering process in plants and the role of photoperiodism.

Describe the impact of light and shade on plant growth and development.

Explain the function and significance of phytochrome in plant responses to light.

Understand the plant's photoperiodic response to light and darkness and its implications for flowering.

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Definitions:

Making Decisions

The cognitive process of selecting a course of action among multiple alternatives to achieve a desired outcome.

Systematic Thinking

An approach to problem-solving that involves understanding and analyzing complex situations in a logical, step-by-step manner.

Problem Solving

The process of identifying, analyzing, and resolving issues or obstacles.

Logical Fashion

An approach or method that is coherent, well-organized, and follows a clear, rational sequence.