Which of the following characteristics distinguishes prokaryotic organisms from eukaryotic organisms?
A. Prokaryotes lack a cell membrane, while eukaryotes do not
B. Prokaryotes are unicellular, while all eukaryotes are multicellular
C. Prokaryotes are aquatic, while eukaryotes are terrestrial
D. Prokaryotes require a host to replicate, while eukaryotes do not
E. Prokaryotes are structurally less complex than eukaryotes are
E. Prokaryotes are structurally less complex than eukaryotes are
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Which of the following statements is true?
A) Endospores are for reproduction. B) Endospores allow a cell to survive environmental changes. C) Endospores are easily stained in a Gram stain. D) A cell produces one endospore and keeps growing. E) A cell can produce many endospores.
The person credited with being the codiscoverer of the theory of natural selection was
a. Alfred Wallace. b. Charles Lyell. c. Thomas Malthus. d. James Hutton. e. John Henslow.
Define the term hemizygous and explain how the hemizygous condition relates to sex-linked inheritanceWhat will be an ideal response?
A hypothetical condition in some domesticated fowl is identified phenotypically by patchy loss of feathers on the animals' backs
Although several factors, genetic and environmental, are found to be involved, only about 3% of any population with any of these factors are found with feather loss. Which of the following is a likely cause? A) continuous variation B) threshold of liability C) low mutation frequency D) high number of alleles in one of the genes E) high number of environmental effects