Also called motor neurons, the ___________ send signals from the brain to the glands and muscles:
a. efferent neurons
b. afferent neurons
c. interneurons
d. neurotransmitters
Ans: a. efferent neurons
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Rodents have been associated with numerous severe epidemics in the past, prompting microbiologist Hans Zinsser in the 1930s to write a book, Rats, Lice, and History, in which he documented the important role of rodents in epidemics
Discuss why rodent control is still desirable, even in an age when it is perceived that the "magic bullets" of chemotherapy and immunization to control infectious disease are readily available. What will be an ideal response?
A nonphotosynthetic plant sharing a mycorrhizal fungus with a photosynthetic plant is best described as a
A. mutualist. B. epiparasite. C. parasite. D. host. E. symbiont.
What is the purpose of ethidium bromide in DNA electrophoresis?
A) To tag DNA fragments so they can be viewed under UV light B) To introduce mutations into the DNA C) To fragment the DNA before separating the pieces by size D) To join fragments of DNA together
Many antibodies are shaped like the letter
a. C. b. E. c. H. d. K. e. Y.