Genes under positive control are ____
a. off until they are turned on
b. always expressed
c. expressed unless a repressor protein is present
d. controlled by several promoters to increase transcription
e. regulated by feedback inhibition
ANSWER: a
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Rat-bite fever caused by S. minus can be differentiated from that caused by S. moniliformis by:
a. chills, fever, headache, vomiting, and of-ten severe joint pains. b. a granulomatous lesion. c. septic arthritis. d. endocarditis.
The term reproductive isolation mechanism refers to ____
a. specific areas where males compete or display for females b. the process by which sexual selection evolves within a population
c. a blockage of gene flow between populations d. the inability of a species to continue reproduction e. legal limits to procreation
How do you calculate surface are to volume ratios?
A.) SA/V B.) SA-V C.) V/SA D.) V-SA
The cuticle of leaves and stems is one modification that enabled plants to move onto land
Indicate whether the statement is true or false