Stress hormones have been shown to interact with drugs of abuse in that
a. stressors enhance the responses of rodents to psychostimulants like amphetamine.
b. humans may relapse to drug use behaviors when under stress.
c. they may alter the responsiveness of brain dopamine systems.
d. All of the above
Answer is d. All of the above
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A cell in prophase I of meiosis has ______________ as much DNA as each of the daughter cells following cytokinesis of meiosis II
A. twice B. half C. one-quarter D. four times
Operon(s) in bacteria
A. refers to a group of genes that are controlled in a coordinate fashion. B. involve polycistronic mRNA. C. involve monocistronic mRNA. D. are also known as Wagnerons. E. refers to a group of genes that are controlled in a coordinate fashion AND involve polycistronic mRNA.
Do microbes use the same enzymes or different ones?
What will be an ideal response?
Where in a flowering plant would meiosis be expected to occur?
a. in trichomes b. in leaves c. in roots d. in flowers