A person chokes when food becomes lodged in
a. the esophagus.
b. the trachea.
c. the larynx.
d. the sinus.
e. none of these
B
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The site at which replication of DNA starts in bacterial cells is known as the ________ of ________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is a gastropod?
a. clam. b. snail. c. squid. d. octopus.
The principle of disinfection to reduce HAIs (healthcare associated infections) among patients was initially introduced by
A) L. Pasteur and R. Koch. B) I. Semmelweis and J. Lister. C) P. Erhlich and A. Fleming. D) J. Snow and R. Koch. E) E. Jenner and L. Pasteur.
In mitosis, the main difference between plant and animal cells is that
A. plants have a central vacuole, while animal cells do not. B. plants do not undergo cytokinesis. C. plants produce a cell membrane in cytokinesis, while animals form a cell plate. D. in plants, kinetochore microtubules shorten and draw chromosomes toward the poles; in animals, polar microtubules lengthen to push chromatids apart. E. plants produce a cell plate to segregate the daughter nuclei, while animals form a cleavage furrow.