The fungus that causes black stem rust of wheat belongs to which fungal group?
a. ascomycetes
b. zygomycetes
c. basidiomycetes
d. chytridiomycetes
e. glomeromycetes
c
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If your mother and father both have cystic fibrosis, which is caused by a recessive allele, the odds of
your having only one allele for the disorder are
a. 1/4. b. 1/2. c. 3/4. d. 1. e. 0.
How many amino acids are known to exist?
a. 100 b. 50 c. 25 d. 20 e. 10
The atomic number of hydrogen is 1. Based on this fact, all of the following must be true of hydrogen gas (H2 ) EXCEPT that it
A) is a stable molecule. B) shares one pair of electrons between the two hydrogen atoms. C) is a polar molecule. D) uses covalent bonds to form the molecule.
Biological molecules are composed of building blocks that are linked together to form ____.
A) functional groups B) ball-and-stick models C) space-filling models D) monomers E) polymers