The stain that does not require heating the slide for better penetration of stain into the mycobac-terial cell wall is known as the:
a. Kinyoun's.
b. Ziehl-Neelsen.
c. immunofluorochrome.
d. carbolfuchsin.
A
The Kinyoun's acid-fast stain is similar to the Ziehl-Neelsen stain but without heat, hence the term cold stain.
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Horozontal rows of parenchymal cells that tranport materials horizontally are called?
A. rays B. tracheids C. vessel elements D. fibers E. sieve tubes
For most metazoans, what is the name of the middle tissue layer during development?
a. mesoglea b. epiderm c. mesoderm d. ectoderm
Which of the following features is NOT an advantage of an organism that has a viviparous life history?
A. The mother supplies the offspring with nourishment, even after birth. B. Development of the offspring occurs inside of the female. C. Offspring can live independently shortly after they are born. D. The eggs are retained within the body of the mother until the offspring are able to fend for themselves. E. The unborn offspring is supplied with a continuous flow of nutrients during development.
A reaction between an antibody and soluble antigen-forming lattices is called a(n)
A) agglutination reaction. B) complement fixation. C) immunofluorescence. D) neutralization reaction. E) precipitation reaction.