Chordates are associated with which anatomical structure?
a. central ring canal
b. metanephridia
c. visceral mass
d. dorsal hollow nerve cord
d. dorsal hollow nerve cord
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If 20% of nucleotides in the DNA of a particular organism contain thymine, estimate the percentage of cytosine that is present in the DNA.
A. 40% B. 80% C. 20% D. 15% E. 30%
Stem cells are produced and developed in the
A) bone marrow. B) brain. C) liver. D) stems of plants.
If the original strand serves as the template for transcription, what is the sequence on the newly formed RNA strand?
What will be an ideal response?
Kisspeptin is a protein that in humans has an important role in initiating secretion of the releasing factor gonadotropin-releasing hormone (GnRH)
Endocrinologists are finding that the protein kisspeptin and its receptor are central to sexual maturation at puberty. If kisspeptin directs the release of GnRH, you would expect that the receptors for kisspeptin will be found in cells of the: A. anterior pituitary. B. posterior pituitary. C. hypothalamus. D. gonads.