The oldest fossils ____
a. demonstrate the widest distribution
b. represent the most highly evolved organisms
c. are buried deeper in the ground than newer forms
d. are found in Africa
e. are primitive marine vertebrates
ANSWER: c
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____ are produced by B cells and possess antibodies attached to their cell surfaces. The cells play a pivotal role in the secondary immune response
Fill in the blank with the appropriate word.
In some families, members inherit a mutant allele that causes a(n) ____________________ to cancer
Fill in the blank(s) with correct word
Which of the following measurements cannot be determined by a spirometer?
A) vital capacity B) inspiratory capacity C) tidal volume D) inspiratory reserve volume E) residual volume
A viral protein needs to be expressed by Escherichia coli for vaccine production. Which of the following steps is NOT a necessary procedure for such production?
A) The Escherichia coli strain is modified to lack proteases. B) The viral protein is cloned under a specific promoter that can be turned on or off easily. C) The viral protein gene is cloned into an expression vector. D) The Escherichia coli strain is modified to express a specific RNA polymerase. E) The Escherichia coli strain is modified to produce an antibody against this vaccine.