The __________ produce(s) __________, which influences biological rhythms and the onset of sleep
a. pituitary gland; thyroid stimulating hormone
b. pituitary gland; adrenocorticotropic hormone
c. pineal gland; melatonin
d. adrenal cortex; cortisol
e. parathyroid glands; parathyroid hormone
C
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Scientific theories are of fundamental importance in science. Explain the difference between the term
"theory" as employed in science versus "theory" as employed in everyday language
What will be an ideal response?All plant organs (such as leaves, roots, and stems) contain tissues from all three tissue systems
Indicate whether the statement is true or false
Which of the following describes the Lac operon in E. coli when both lactose and glucose are present in the culture medium?
A. The Lac repressor, but not CAP, is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. B. Neither CAP nor the Lac repressor is bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. C. CAP and the Lac repressor are both bound to the Lac operon's regulatory DNA, and the Lac operon is not expressed. D. CAP binds to the Lac repressor, preventing it from binding to the Lac operon's regulatory DNA, and the Lac operon is expressed. E. CAP, but not the Lac repressor, is bound to the Lac operon's regulatory DNA, and the Lac operon is expressed.
The first reptiles were the sail-back
A. dinosaurs. B. therapsids. C. pelycosaurs. D. thecodonts.