What distinguishes the mycoplasmas from others within Bacteria?

a. large size
b. contain lipoteichoic acids
c. lack of cell wall
d. all of the above


Answer: C

Biology & Microbiology

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In the United States, solid municipal waste can no longer be dumped ____

a. in garbage dumps b. in biodegradable bags c. in garbage bags d. in landfills e. in the sea

Biology & Microbiology

If a person has two different copies of the same gene, they are said to be ___________.

a) Homozygous b) Heterozygous c) Polygenetic d) Haploid

Biology & Microbiology

Why is it important to compare DNA sequences in the construction of an evolutionary tree?

a. Similarities in physical appearance cannot be used to construct and evolutionary tree. b. Convergent evolution can cause distantly related organisms to appear closely related. DNA sequence analysis can show that they are actually distantly related. c. DNA sequence comparison is not required; homologous features alone are sufficient in evolutionary tree construction. d. RNA sequences are actually more important in constructing an evolutionary tree since they are the precursors to DNA. e. None of the above

Biology & Microbiology

Which of the following examples best illustrates the concept of spontaneous generation?

a. During flooding, frogs spontaneously arise from mud. b. When a dried bean is moistened and kept wet, it spontaneously transforms into a bean sprout. c. Some sea anemones spontaneously bud newly developed young from their outer skin. d. All of the above. e. A and B, but not C

Biology & Microbiology