Which one of the following is a defining characteristic of animals but not of plants?
A. Animals, but not plants, are heterotrophs
B. Animals, but not plants, are prokaryotes
C. Animals, but not plants, are eukaryotes
D. Animals, but not plants, are autotrophs
Answer: A
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The lac operon is active when what is present
What will be an ideal response?
____ is a sugar.
A. Sucrase B. Pentose C. C27H46O D. COOH-CH2-NH3
What is produced during transcription?
a. RNA molecules b. DNA molecules c. RNA polymerase d. proteins
Fibroblast cells are a good model system for studying muscle differentiation because
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