Many flowers growing in a cluster along a stem are known as
A. a perfect flower.
B. a bouquet.
C. a pistil.
D. an inflorescence.
E. a complete flower.
Answer: D
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Cyclic AMP (cAMP) is involved in the global regulation of catabolic pathways in Escherichia coli, including the lac operon, and a low activity of adenylate cyclase that makes cAMP is suggestive of catabolite repression
Indicate whether the statement is true or false.
Which structure do prokaryotic cells lack?
a. nucleoid regions b. membrane-bound nuclei c. cytoplasm d. a plasma membrane e. DNA
Which term refers to a nutrient that is required by a microorganism in large quantities for use in cell structure and metabolism?
A. element B. growth factor C. trace element D. macronutrient
What type of mutation involves base changes in the gene, which result in a change in the amino acid without affecting the activity of the resulting polypeptide?
a. insertion b. deletion c. silent mutation d. neutral substitution e. null mutation