Which of the following is true of both T cells and B cells?
A. They are produced from stem cells of the bone marrow.
B. They can help attack and destroy invading pathogens.
C. They are effector cells against specific pathogens.
D. They typically have a short life span.
E. All of these statements are true.
Answer: E
You might also like to view...
Provide a 1-sentence explanation of how each of the following structures can be used to propagate
plants asexually: suckers, corms, stolons. BONUS: Identify one representative plant that is capable of each type of reproduction identified What will be an ideal response?
Which of the following best reflects what we know about how the flu virus moves between species?
A) The flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected. B) A flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans. C) An influenza virus gains new sequences of DNA from another virus, such as a herpesvirus; this enables it to be transmitted to a human host. D) An animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates, the virus is passed to a new species such as a bird, and the virus mutates again and can now be transmitted to humans.
Animals probably developed from
A. Bacteria. B. Flagellated Protista. C. Slimemolds. D. Fungi.
Individuals with asthma should exercise in cold weather whenever possible.
a. true b. false