Which of the following does not utilize active transport?
A. concentrating iodine ions in the thyroid gland
B. absorbing sugar in the gut
C. movement of sodium and potassium in nerve cells
D. movement of oxygen from the lungs into the blood
E. water homeostasis in the kidneys
Answer: D
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Antibiotics that affect various strains of Gram-positive bacteria and various strains of Gram-negative bacteria are called
A. isolate usable. B. stress-induced. C. narrow-spectrum. D. broad-spectrum.
What is the name given to the hollow space within the endoplasmic reticulum?
a. vacuole b. endoplasmic void c. lumen d. nucleolus
Why is it important to maintain a collection of wild relatives of crop plants?
a. Humans have a natural urge to collect things. b. It allows future generations to see plants that are gone. c. Seeds are not stable. d. Crop plants do not produce their own seeds. e. It provides insurance in the form of genetic diversity.
During protein synthesis, genes in DNA are copied, making ________ RNA.
Fill in the blank(s) with the appropriate word(s).