Most human somatic cells are:a
polyploid.
b. diploid.
c. aneuploid.
d. tetraploid.
e. haploid
B
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A child is born with dwarfism (tt). His parents are of normal height. Which of the following must be TRUE of the parents?
A) They are both homozygous dominant tall. B) They are both heterozygous dwarf. C) They are both homozygous recessive dwarf. D) They are both heterozygous tall.
Which of the following is true of microbes?
a. 99% of all microbes are pathogenic. b. All bacterial enzymes are harmful to humans and the environment. c. Gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy. d. Microbes create pollutants and toxins that harm the environment.
Yeasts can produce ATP by either fermentation or oxidative phosphorylation; thus, they are
A) strict anaerobes. B) strict aerobes. C) facultative anaerobes. D) facultative aerobes.
Lactobacillus acidophilus ferments _____in the vagina into____, which protects against pathogenic microbes.
a) pyruvate, citric acid b) glycogen, pyruvate c) Lactic acid, citric acid d) glycogen, lactic acid