D.<span>Birds have developed effective skills to survive.</span>
Answer:
Vaccines prevent the spread of contagious, dangerous, and deadly diseases. These include measles, polio, mumps, chicken pox, whooping cough, diphtheria, and HPV. The first vaccine discovered was the smallpox vaccine. Smallpox was a deadly illness.
A vaccine activates our immune system without making us sick. Many dangerous infectious diseases can be prevented in this simple and effective way. A vaccine activates our immune system without making us sick.
Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Newer vaccines contain the blueprint for producing antigens rather than the antigen itself.
Explanation:
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Answer:
B: to carry across.
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I'm also taking the Cumulative Exam.
Answer:
The setting plays a key role in this story. The feud between the two families is over a narrow piece of land. ... This harsh outdoor setting suggests that nature is unforgiving and/or indifferent to man/men and their concerns. This is a symbolic foreshadowing because the conflict will shift from "man vs.
