Which of the following pathogens would our innate immunity help protect us against?
A. fungi
B. bacteria
C. viruses
D. Innate immunity would defend us against all of these pathogens.
Answer: D
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Which of the following classes is comprised of carnivorous predators that are able to extend their stomachs through their mouths to feed?
A) Ophiuroidea B) Holothuroidea C) Asteroidea D) Crinoidea E) Echinoidea
Ediacaran organisms
A. lived from about 600 million years ago to about 540 million years ago. B. have been thought to be ferns, worms, or fungi. C. All of the answer choices are correct. D. lived during the Precambrian period. E. did not leave any modern-day descendants.
Which of the following is associated with the attachment of a bacteriophage to a bacterial cell?
A) random collisions B) chemical attractions C) receptor specificity D) both chemical attractions and receptor specificity E) random collisions, chemical attractions, and receptor specificity
Which of the following statements about genomic libraries and cDNA libraries is TRUE?
A. A genomic library is made using reverse transcriptase. B. A cDNA library is derived from mRNA and is made using reverse transcriptase. C. A genomic library is derived from mRNA. D. A cDNA library is derived from chromosomal DNA. E. A genomic library is derived from mRNA and is made using reverse transcriptase.