The process of fermentation requires oxygen
1.True
2.False
2
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The high variability of the types of G protein-coupled receptors allows for:
A. different types of cells to respond to different types of signals. B. different types of signal-transduction pathways to respond to signals. C. a rapid response to cell signals. D. a sensitive response to cell signals. E. All of these choices are correct.
When is it believed that sponges evolved?
a. 3.2 billion years ago b. 1.2 billion years ago c. 870 million years ago d. 650 million years ago e. 420 million years ago
All of the following groups had taxonomic significance in the past, but only one is now considered to be a diverse clade. Which group is it?
a. algae b. protist c. protozoa d. monera e. Euglenozoa
Harmful substances are detoxified within the cell by the ________
Fill in the blank(s) with correct word