Viruses with ________ sense RNA contain the correct message for translation, while viruses with ________ sense RNA must first be converted into a correct message.
Fill in the blank(s) with the appropriate word(s).
positive; negative
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The lens of the eye loses dowith age and cannot change from viewing distant objects and close objects as readily as before.
Answer the following statement(s) true (T) or false (F)
To discover a catabolic gene cluster, cloning large sequences of approximately 40 kbp requires the utility of
A) bacterial artificial chromosomes (BACs). B) cosmids or fosmids. C) a eukaryotic host to house the large foreign DNA. D) multiple gene fusions.
Which of the following are used to generate biofuels?
a. single-celled algae b. crop plants c. multicellular algae d. any plants
What ecological role were the nitrogen-fixing Bradyrhizobium japonicum bacteria in soybean root nodules effectively playing when the experimenters cut off gaseous nitrogen?
a. parasite c. commensal b. predator d. symbiont