Which component is the oxidizing agent in the following chemical reaction?
4 Fe + 3 O2 ? 2 Fe2O3
a. water
b. iron
c. oxygen
d. rust
e. hydrogen
C
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Observe the photomicrograph accompanying this question. This thin section of a potato tuber has been stained with Lugol’s iodine solution. When you eat french fries, the potato material is broken down in your small intestine into what kind of small subunits?
What will be an ideal response?
An animal that is infected with a parasitic organism that can also infect humans is called a(n) ________ host.
A. transfer B. reservoir C. intermediate D. endoparasitic
The "backbone" of a nucleic acid molecule is made of
A) lipids. B) NAD+ and FAD. C) amino acids. D) ATP molecules. E) sugar and phosphate groups.
While a backhoe operator is helping to clear land that will be used for a poultry farm, the equipment opens up a hidden chamber in which old electrical transformers have been buried. The operator knows that transformers contain PCBs. Why should this
person warn the owners of the land? What will be an ideal response?