The layers of cells that protect the root apical meristem are the
A. endodermis.
B. bark.
C. periderm.
D. root cap.
E. cortex.
Answer: D
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The trp operon is an example of which type of transcriptional regulation?
A. post translational B. methylation C. a repressor which is activated by the presence of the amino acid tryptophan D. none of the above
The behavioral response tested using the models in Figure 51-1 is:
a. classical conditioning. b. habituation. c. imprinting. d. insight. e. a sign stimulus
When properly aligned, the enzyme and substrate form an enzyme-substrate (ES)______.
Fill in the blank(s) with the appropriate word(s).
The underlying factor that allows an organism to become a separate species is _____.
a. ability to produce a hybrid b. polyploidy c. sufficiently large genetic differences d. isolation e. genetic divergence