Which of the following choices correctly pairs a mineral with one of its major functions in the body?
A) calcium, used in amino acid metabolism
B) phosphorus, maintaining water balance
C) iron, component of the nucleic acid backbone
D) sodium, maintaining water balance in cells
Answer: D
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Which of the following is NOT one of the functions of vascular tissue in plants?
A. physical support of the plant B. transport of water C. transport of minerals D. transport of organic compounds E. transport of gametes
How does water pressure one meter below the surface of a small pond compare to water pressure one meter below the surface of a large lake
What will be an ideal response?
Which one or more of the following is true about root endodermis?
A. The endodermis contains impermeable lignin and suberin called a Casparian strip that controls water and nutrient movement between adjacent cell walls. B. The endodermis is two to three layers of spherical cells. C. The endodermis forms a boundary between the cortex and inner vascular cylinder of the root. D. All of the choices are true of root endodermis. E. The endodermis forms a boundary between the cortex and inner vascular cylinder of the root and contains impermeable lignin and suberin.
Plasma cells are activated by a(n)
A) antigen. B) T cell. C) B cell. D) memory cell. E) APC.