A researcher is studying the function of a peptide hormone in rabbits and humans. She notices that this hormone has a different effect in these two mammals, despite the hormone receptor having the same sequence (and structure) in both animals
What accounts for this
difference in hormone function?
What will be an ideal response?
sequence differences in components of the associated second messenger pathway
sequence differences in the hormone's target genes
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Which is true about the RNA transcript?
A. It is formed using the DNA minus strand as a template. B. It has the same 5'-3' orientation as the DNA positive strand. C. It is made in short fragments that are then stitched together. D. The template starts at the promoter region. E. It is formed using the DNA minus strand as a template, it has the same 5'-3' orientation as the DNA positive strand, AND the template starts at the promoter region.
The "skeleton" of a typical sponge is composed of
a. bones. b. cartilages. c. spicules. d. scales.
Which of the following feeding tactics is consistent with this list of features: two-part stomach capable of breaking down tough food particles; simple mouthparts;
and the ability to burrow through, and consume, indigestible fecal material to get to hidden food? A) suspension feeder B) fluid feeder C) deposit feeder D) food-mass feeder
Sounds
a. are waves of compressed air. b. are detected by mechanoreceptors. c. may be measured, with respect to their loudness, in decibels. d. that vary by one decibel can be differentiated by the human ear. e. include all of these.