Which is FALSE about abstaining from substance abuse?
What will be an ideal response?
commonly causes sleep problems during withdrawal, but generally resolves during recovery.
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Match the following items with the correct phrases.
_______1. Have an internal organization described as a “9 + 2” arrangement of microtubules. _______2. A type of glycocalyx having an organized structure and found firmly attached to bacterial cell walls. _______3. Some play a role in bacterial conjugation (“bacterial mating”). _______4. They often serve an antiphagocytic function. _______5. Terms like monotrichous and peritrichous describe their location. _______6. Some of these thin, hairlike appendages enable bacteria to adhere to surfaces. _______7. Some Pseudomonas species produce this type of glycocalyx, which lacks an organized structure and is only loosely attached to the bacterial cell wall. _______8. Used to make Hib vaccine. a. pili b. slime layer c. procaryotic flagella d. capsules e. eucaryotic flagella
Two F+ E. coli strains are co-cultured in the same flask. One is Strr Thr+ and the other is Genr Thr?. The culture is then plated on minimal media that is supplemented with gentamycin only (not threonine) and a few colonies grow. What sort of genetic exchange is most likely occurring?
A) transformation B) conjugation C) transduction D) electroporation
DNA replication is a semi-conservative process. This means that after replication, ________.
A. each new DNA double helix consists of two old strands B. each new DNA double helix consists of two new strands C. each new DNA double helix contains 25% of the old DNA double helix D. each new DNA double helix consists of one old strand and one new strand
Scientific evidence suggests that Earth had cooled enough for_____ to accumulate by 4.3 billion years ago
a. carbon monoxide b. carbon dioxide c. oxygen d. water e. nuclei