Which of the following glands produces

calcitonin in children and adolescents?



a. thyroid
b. parathyroid
c. thymus
d. hypothalamus
e. anterior pituitary


A

Biology & Microbiology

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The DNA molecules contain six different bases

a. True b. False Indicate whether the statement is true or false

Biology & Microbiology

Figure 17.9 The graph above shows the survival of sociable weavers as a function of body mass. Sociable weaver body mass seems to be an example of ____.

A. directional selection B. stabilizing selection C. sexual selection D. disruptive selection E. artificial selection

Biology & Microbiology

In vertebrates, DNA methylation-the addition of a methyl group to DNA nucleotides-ensures that

A. the gene functions without interruption. B. the nucleosome will quickly form, which assists in mRNA formation. C. once a gene is turned off, it will remain off. D. once that gene is transcribed, the mRNA is saved and used over and over again. E. no errors will be made during transcription.

Biology & Microbiology

Which of the following structures is NOT found in some prokaryotic cells?

A) flagellum B) axial filament C) cilium D) pilus E) peritrichous flagella

Biology & Microbiology