The simplest sensory receptors are __________ that respond to mechanical distortion, changes in temperature, or specific chemicals.  

A.  nociceptors
B.  free nerve endings
C.  gated channels
D.  photoreceptors
E.  ganglia


B.  free nerve endings

Biology & Microbiology

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For a gene with complete dominance, the recessive allele has no effect on the phenotype of a heterozygote

Indicate whether the statement is true or false

Biology & Microbiology

Which hormone stimulates both leaf abscission and fruit ripening?

a. abscisic acid b. auxin c. cytokinin d. ethylene e. gibberellin

Biology & Microbiology

The tropical diseases such as African sleeping sickness, Chagas disease, and leishmaniasis are caused by

A. trypanosomes. B. phytomastigotes. C. sporozoans. D. foraminifera. E. oomycetes.

Biology & Microbiology

In snapdragons, heterozygous plants have pink flowers, one of the homozygous conditions produces red flowers, and the other homozygous condition produces white flowers. When a parent plant with red flowers is crossed with a parent plant with white flowers, what percentage of the F1 offspring are expected to have pink flowers?

a) 75% b) 25% c) 0% d) 100% e) 50%

Biology & Microbiology