Which control mechanism is responsible for Escherichia coli using glucose as a carbon substrate and NOT inducing other pathways?
a. catabolite induction
b. catabolite repression
c. signal transduction
d. stringent response
Answer: C
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________ is the direct migration and penetration of cancer cells into neighboring tissues.
Fill in the blank(s) with the appropriate word(s).
The skeleton of vertebrates serves several important functions. Among these are
_____ support and locomotion. _____ blood formation. _____ conduction of nerve signals. _____ protection of organs and soft tissues. _____ calcium homeostasis.
The part of the brain that deals with the basic drives such as hunger, sex, and thirst is the:
a. cerebrum b. pons c. cerebellum d. thalamus e. hypothalamus
The chewy, stringy supporting strands in
celery are which cells?
a. xylem b. collenchyma c. phloem d. sclerenchyma e. parenchyma