All cells have:
A. a nucleus.
B. genetic information.
C. internal compartments.
D. a cell wall.
Answer Key: B
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In the primary stage of syphilis, the initial symptom is a small, painless, reddened ulcer called a ________.
Fill in the blank(s) with the appropriate word(s).
A study of the human ecological footprint conducted by the World Wildlife Fund in 2008 shows that ________
A) we have already exceeded the planet's biocapacity per person B) we are far below the planet's biocapacity per person C) Earth can sustain a population about double the current population D) the human population will soon crash
Fungi that feed on dead tissue are saprophytes
Indicate whether the statement is true or false
Which fermentation product is important for making bread rise?
A) ethanol B) CO2 C) lactic acid D) hydrogen gas