The main steps of the nitrogen cycle are:a
nitrogen fixation, nitrification, assimilation, digestion, and denitrification.
b. nitrigenation, nitrification, assimilation, ammonification, and denitrification.
c. nitrogen fixation, nitrification, assimilation, ammonification, and dinitrification.
d. nitrogen fixation, nitrification, assimilation, carbonation, and denitrification.
e. nitrogen fixation, oxidation, assimilation, ammonification, and denitrification.
c
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When was the Carboniferous period?
a. about 17 million years ago b. about 125 million years ago c. about 250 million years ago d. about 1.5 billion years ago
The DNA copies that are produced by PCR amplification are called a(n) ___.
What will be an ideal response?
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What will be an ideal response?
What is the site of primary sensory integration in the brain?
A. Cerebrum B. Thalamus C. Medulla oblongata D. Corpus callosum E. Cerebellum