In a bacterial cross in which the donor (Hfr) is a+b+ and the recipient strain (F-) is a-b-, it is expected that recombinant bacteria will all be a+b+
Indicate whether the statement is true or false
FALSE
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During the past century the global sea level has risen ________ in response to global warming. a. 16 inches b. 1 meter c. It hasn't risen at all
d. 2 feet e. 8 inches
Which of the following lack a nucleus and are structurally simple?
a. eukaryotes b. prokaryotes c. fungi d. algae e. protists
Which of the following would be the most effective strategy to remove toxic heavy metals from a soil?
A) heavy irrigation to leach out the heavy metals B) application of sulfur to lower the soil pH and precipitate the heavy metals C) adding plant species that have the ability to take up and accumulate heavy metals D) inoculating soil with mycorrhizae to avoid heavy-metal uptake
Answer the following questions true (T) or false (F)
1. Sinusitis is routinely treated with antibiotics, which is appropriate because most cases are due to bacterial infections. 2. In most individuals, symptoms of the common cold and of influenza are virtually impossible to tell apart in severity. 3. To date, only zoonotic strains of hantavirus have been detected.