A nutrient medium that contains at least one ingredient that is not chemically defined is termed ________.
A. complex
B. enriched
C. synthetic
D. reducing
Answer: A
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Which of the following occurs during metaphase
A. heterochromatin is converted to euchromatin. B. chromosomes are about 30 nm wide. C. chromosomes are much shorter than they were in interphase. D. chromosomes undergo gene transcription. E. the "beads on a string" structure is visible.
Signaling molecules act locally or regionally to ________
a. all of the choices b. influence gene expression only c. regulate growth, development, and reproduction only d. adjust metabolism only
Larger populations generally are killed as rapidly as smaller populations.
Answer the following statement true (T) or false (F)
How might ants on an acacia tree serve in a mutualistic relationship?
A) The ants fight off potential herbivores. B) The ants carry disease. C) The ants bring nitrogen to the tree. D) The ants bring sugar to the tree.