The first terrestrial animals were probably
A) reptiles. B) arthropods. C) dinosaurs. D) mammals. E) amphibians.
B
Biology & Microbiology
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How long does it take for the primary immune response to kick in after the first exposure to an antigen?
a. 2 weeks b. 3 - 4 days c. 2 months d. 6 weeks e. 12 hours
Biology & Microbiology
The polymerase chain reaction (PCR) uses ________, nucleotides, and a heat-resistant DNA polymerase to rapidly
increase the number of molecules of a DNA fragment. Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
The compound that Dr. Folling isolated from the urine of the Egeland children was ____________
A. phenylalanine D. phtalamine B. pyruvic acid E. pertussic acid C. phenylpyruvic acid
Biology & Microbiology
Solvent
What will be an ideal response?
Biology & Microbiology