Acellular vaccines and subunit vaccines
A. contain modified bacterial exotoxin molecules.
B. confer passive immunity.
C. are always genetically engineered.
D. contain select antigenic components of a pathogen rather than whole cells or viruses.
E. All of these choices are correct.
Answer: D
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The PCR technique doubles the amount of DNA in a sample in each cycle. If you started the PCR technique with two fragments of double-stranded DNA, calculate how many double-stranded DNA fragments you would you have after four cycles
A) 8 B) 16 C) 32 D) 64
Deuterostomes are split into the Ecdysozoa and the Lophotrochozoa
____________________ Indicate whether the statement is true or false.
Plants exude ____ from roots to stimulate the growth of soil fungi
a. strigolactones b. cytokinins c. ethylene d. auxins e. jasmonates
Which of the following is a diploid stage in the
life cycle of fungi?
a. zygote b. spores c. gametes d. vegetative growth of hyphae e. cell reproduction by budding or fragmentation