Nearly ALL cases of acute listeriosis require hospitalization
Indicate whether the statement is true or false.
Answer: TRUE
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A species of insect that lives solely on pine sap was found to contain a bacterial symbiont
Genome sequencing of both the host and the symbiont revealed that the symbiont lacked many genes required for energy production, and the host lacked genes for biosynthesis of several essential amino acids. What is/are the most likely mechanism(s) that caused the loss of these genes? A) coevolution B) horizontal gene transfer C) increased mutation rate D) horizontal gene transfer and increased mutation rate
The depth to which light penetrates with sufficient intensity to support the activities of photoautotrophic organisms in the ocean is called the ________ zone.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is NOT true of the
structures labeled “D” in the figure? a. They are sexual spores. b. They are haploid. c. They will germinate to produce a new mycelium. d. They will give rise to different mating strains of the fungus. e. They may fuse to produce a zygote.
In most organisms, the flow of information is from
A. protein, DNA, then RNA. B. DNA, RNA, then protein. C. RNA, DNA, then protein. D. protein, RNA, and DNA.