Melatonin levels in mammals are regulated by a(n) ____
a. inhibitory pathway
b. stimulating pathway
c. negative feedback loop
d. positive feedback loop
e. triggering signal
ANSWER: a
You might also like to view...
A person is genotypically blood type A. However, this individual also does not produce the lipid to which N-acetylgalactosamine is added, so the lipid is therefore not expressed on the surface of erythrocytes. This situation is known as the Bombay phenotype. When tested, this person will appear to be blood type
A) A. B) B. C) AB. D) O.
What is the correct sequence of events that has led to the decimation of the kelp beds along the west coast of the U.S.?a. sea otters decline in numbersb. increase in orca predation on sea ottersc. decline in the seals and sea lionsd. overfishing of the herring and perche. increase in the sea urchin population
A. d - c - b - a - e B. b - d - c - a - e C. d - b - c - a - e D. d - c - b - e - a E. a - d - c - b - e
The sides of the DNA ladder (backbone) are
A. the R groups. B. alternating carbons and nitrogens. C. the nitrogenous bases. D. alternating nitrogens and phosphates. E. sugars and phosphates.
The goal of ________ is to identify each protein present in a given microenvironment at the time of sampling.
A. metagenomics B. both metagenomics and metaproteomics C. metaproteomics D. None of the choices are correct.