Which of the following can be present in a vaccine?

a. live pathogen
b. weakened B-cells
c. unmodified antigen from a pathogen
d. killed pathogen or weakened pathogen
e. killed pathogen or weakened pathogen or unmodified antigen from a pathogen


D

Biology & Microbiology

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Examine the flux diagrams in Figure 25.6 to address the following questions. True or false. CO2 is considered a greenhouse gas because it traps heat emitted from Earth's surface in the atmosphere, affecting global temperatures

Indicate whether the statement is true or false.

Biology & Microbiology

The appearance of __________ marks the onset of

gastrulation in humans. a. a notochord b. the primitive streak c. mesoderm d. neural folds e. somites

Biology & Microbiology

Which of the following is a single-layered, hollow ball of 16 cells?

a. cleavage b. morula c. gastrula d. zygote e. blastula

Biology & Microbiology

Which of the following is most likely to be aquatic?

A) suspension feeder B) mass feeder C) deposit feeder D) fluid feeder

Biology & Microbiology