Plants require sulfur as a nutrient because some important cell components have sulfur in their composition. Which of these biomolecules contain sulfur?
a. cellulose
b. ATP
c. methionine
d. fructose
c. methionine
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A single nucleotide polymorphism, or SNP, results from a mutation that causes changes to just a single base pair of DNA. Which one of the following statements is true about SNPs?
A. SNPs can be associated with certain diseases, such as Parkinson's disease. B. SNPs can be associated with certain physical traits, such as baldness. C. SNPs can reveal a person's ancestry. D. SNPs can be detected by DNA microarrays. E. All of the answer options are true about SNPs.
Animals are distinguished from other groups of eukaryotic organisms in that they (select all that apply):
A. are multicellular heterotrophs lacking cell walls. B. have embryos that include a gastrula stage. C. produce collagen. D. are multicellular heterotrophs lacking cell walls and have embryos that include a gastrula stage. E. move.
Who is credited with developing and documenting the first vaccination procedure against smallpox?
A. Pasteur B. Koch C. Lister D. Jenner
Adenoviruses infect
A) the digestive tract. B) the respiratory tract. C) the nervous system. D) both the digestive tract and the respiratory tract. E) both the respiratory tract and the nervous system.