Which of the following is the proper order of cells for water and minerals to travel from the soil into the xylem?
A. endodermis, cortex, epidermis, endodermis
B. root hair, cortex, endodermis, xylem
C. root hair, endodermis, cortex, xylem
D. root hair, cortex, epidermis, endodermis
E. root hair, cortex, endodermis, phloem, xylem
Answer: B
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Are genetically modified organisms safe for humans to consume?
A. No, genetically modified organisms are not safe for humans to consume. B. We do not currently have any data on whether genetically modified organisms are safe for humans to consume. C. Yes, genetically modified organisms have been found to be extremely safe for humans to consume, and research is no longer assessing this question. D. Yes, short-term research on animals seems to indicate that genetically modified organisms are safe for humans to consume.
Answer the following statements true (T) or false (F)
1. Zooplankton are heterotrophs. 2. Biomass is always highest at the lower trophic levels. 3. Most of the Earth's phosphorus is trapped in sedimentary rocks. 4. Assimilation is the process by which inorganic substances are incorporated into organic molecules.
The average life expectancy for males in the United States is
a. 80 years. b. 79 years. c. 76 years. d. 74 years. e. 65 years.
When brown algae divide asexually, each new cell retains half of the original cell
__________________ Indicate whether the statement is true or false.