The 2000–2004 drought in California:
a. shortened the growing season of the mustard plant.
b. led to earlier flowering in the mustard plant.
c. created selective forces that changed the characteristics of the mustard plant.
d. All of the above.
e. A and C.
D
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Simple multicellular organisms show which of the following characteristics?
A. All of these options are characteristics of simple multicellular organisms. B. adhesion of cells C. little differentiation of specialized cell types D. little communication between cells E. little transfer of resources between cells
A thermoreceptor responds to:
A. wet and/or dry environmental conditions B. temperature C. physical force D. pain
A new hormone has been isolated from an organism. Although the structure of the hormone has not yet been determined, the hormone is known to exert its effects by forming a hormone -receptor complex that acts as a transcription factor within target cells
What type of hormone is this most likely to be? A. a steroid hormone B. either an amine or a peptide hormone C. either a steroid hormone or an amine hormone D. either a steroid or a peptide hormone E. a peptide hormone
In addition to microtubule motor proteins, ________ are also involved in vesicular transport.
A) nonmuscle myosins B) actin C) tubulin D) leptin E) dyesins