Tungsten is a reagent used in the
A. acid-fast stain.
B. electron microscopy stain.
C. endospore stain.
D. flagellar stain.
E. negative stain.
Answer: B
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Plants have special groups of self-renewing cells called
A. root cells. B. chloroplasts. C. cast cells. D. meristems.
Conifer sporophytes are longer-lived, and anatomically and morphologically more complex than other
gymnosperms.
Indicate whether the statement is true or false.The primary effect of increased PO2 in the lungs is to cause ________ which ________ the ventilation-perfusion ratio back to a normal level.
A) vasoconstriction : increases B) vasodilation : decreases C) vasoconstriction : decreases D) bronchoconstriction : decreases E) bronchodilation : increases
Which statement with regard to pore spaces is false?
a. Minerals are removed from soil via leaching. b. Water is held in the smaller pores, and air is found in the larger pores. c. They occupy approximately 50% of a soil's volume. d. They typically contain more carbon dioxide than found in the atmosphere. e. Immediately after a heavy rain, most pore spaces remain filled with air.