In the oceans, sulfur exists primarily as ________, and in rocks and sediments sulfur occurs mostly as ________ and ________
A) hydrogen sulfide (H2S) / gypsum (CaSO4) / elemental sulfur (So)
B) hydrogen sulfide (H2S) / sulfate (SO42-) / elemental sulfur (So)
C) sulfate (SO42-) / gypsum (CaSO4) / pyrite (FeS2)
D) sulfate (SO42-) / sulfide (H2S) / elemental sulfur (So)
Answer: C
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a. fragmentation b. protoplast fusion c. somaclonal selection d. grafting e. apomixes
A dance that recruits other bees into foraging close
by the hive is indicated by a. A. b. B. c. C. d. D. e. E.
The abundance of hydrogen ions in solution is a measure of ________
Fill in the blank(s) with correct word
A stretch receptor is classified as a ____.
A. chemoreceptor B. mechanoreceptor C. photoreceptor D. thermoreceptor E. nociceptor