Before microorganisms are stained, MOST appear ________ when viewed with brightfield microscopy.
a) golden
b) green
c) colorless
d) hollow
Ans: c) colorless
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Which element's isotope is commonly used to determine when biological samples such as fossils, were formed?
A. nitrogen B. sulfur C. oxygen D. carbon E. hydrogen
Which of the following is NOT true about the cohesion-tension model of water transport?
Select one: a. Water must completely fill the pipeline. b. Water molecules attract one another. c. Transpiration exerts a tension as water evaporates from leaves. d. Water is transported in the phloem. e. Water must be attracted to the sides of the xylem.
Describe the major histocompatability complex with regard to its: a) location, b) composition, c) relationship to specific cell markers, and d) role in regulation of immune reactions.
What will be an ideal response?
Dehydration synthesis is a common feature of polymer production in cells.
Answer the following statement true (T) or false (F)