Lipid-soluble chemical signals usually _______.
a. bind to receptors in the plasma membrane
b. cause phosphorylation of a cytoplasmic enzyme
c. bind to nuclear receptors
d. activate janus kinases
Answer: c. bind to nuclear receptors
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How do fungi in the soil of rain forests encourage plant diversity?
A. By serving as pathogens for particular plant species, fungi encourage plant diversity. B. By serving as pollinators, fungi introduce plant diversity into new regions. C. By forming mycorrizhae with plants, fungi introduce plant diversity into new regions.
Which of the following types of control agents would be used to achieve sterility?
A. Bactericide B. Virucide C. Germicide D. Fungicide E. Sporicide
In human cells, DNA replication begins at the top of each chromosome and spreads down the length. Indicate whether the statement is true or false
Vertebrae of the spinal cord are separated from each other by compressible, flat structures called ________ disks
Fill in the blank(s) with correct word