Receptors in the human nose are
a. chemoreceptors.
b. mechanoreceptors.
c. photoreceptors.
d. nociceptors.
e. osmoreceptors.
A
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The growth-promoting substance that promotes stem elongation and bending toward light is produced
primarily in
a. root tips, traveling to the stem in the xylem. b. the center of the stem region where elongation or bending occurs. c. flowers and flower buds. d. the shoot tip. e. root tips, traveling to the stem in the phloem.
Autoclaving is effective for most materials except for
A) proteins. B) enzymes. C) amino acids. D) oils.
The honeycreepers are a group of Hawaiian birds with many different species that all evolved from a single species that migrated from the Americas. The speciation of the honeycreepers is most likely to be an example of which pattern of evolution?
a. autopolyploidy b. allopolyploidy c. convergent evolution d. adaptive radiation e. convergent radiation
Why are STDs so easily spread?
What will be an ideal response?