Carbolfuchsin is the ________ in the acid-fast stain.

A. primary stain
B. mordant
C. decolorizer
D. counterstain
E. fixing reagent


Answer: A

Biology & Microbiology

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Which of the following is not a helminth that causes intestinal symptoms accompanied by migratory symptoms?

A. Trichuris trichiura B. Ascaris lumbricoides C. Necator americanus D. Toxocara

Biology & Microbiology

Most DNA-based phylogenetic analyses place humans and chimpanzees (including bonobos) as each other's closest relatives, but a persistent minority of studies place gorillas and chimpanzees as sharing a common ancestor that was not a human ancestor

The reason is incomplete lineage sorting, which simply means that ________. A) the ancestral species of all great apes was genetically variable at some loci, and each descendant species lost different random combinations of ancestral alleles B) the labs that sequenced great ape DNA made a simple procedural error C) mitochondrial genes can become unlinked and be inherited by independent assortment D) primate lineages are not completely reproductively isolated and can hybridize E) coding regions of the primate genome are more likely to give false results than noncoding regions such as SINEs

Biology & Microbiology

Each structure labeled 4 in Figure 41-1 is:


a. a node of Ranvier.
b. a cell body.
c. a dendrite.
d. a synaptic terminal.
e. an axon.

Biology & Microbiology

Nucleolus , chromatin are the structures seen in the

a. cytoplasm b. chloroplast c. nucleus

Biology & Microbiology