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Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 400 students taken from this year's student body showed the following number of students in each classification. We are interested in determining whether or not there has been a significant change in the classifications between the last school year and this school year. At a .01 level of significance, the null hypothesis
Root Hairs
Thin, hair-like extensions of root epidermal cells that increase surface area for water and nutrient absorption from the soil.
Xylem
is a type of tissue in plants that transports water and dissolved nutrients from the roots to the rest of the plant.
Meristem
Regions in plants where new cells are continuously produced, allowing for plant growth.
Photosynthesis
The process by which green plants, algae, and some bacteria convert carbon dioxide and water into glucose and oxygen using light energy captured by chlorophyll.
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