Tissues suspected of containing Acanthamoeba cysts can be observed using various stains. A cyst that stains black has most likely been stained with the __________ stain
a. methenamine silver
b. periodic acid–Schiff (PAS)
c. Giemsa
d. Wright's
A
In infections caused by Acanthamoeba spp., PAS stains the cyst wall red and methenamine silver stains the cyst black.
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A mutation in a Hox gene typically results in
A. development of normal body parts in abnormal places. B. faulty development of the cellular blastoderm. C. cleavage disruption. D. legs growing out of the head of a fly.
Connective tissue includes adipose tissue, tendons, bone, cartilage, and blood. What do all these tissues have in common?
A. They all consist of few cells sparsely distributed in large amounts of extracellular material. B. They all provide structural support to the body. C. They are all hard tissues. D. They all physically bind other tissues together.
Most fossils form in sedimentary rocks
a. True b. False
Some cases of CJD may be caused by a mutation of the PrP gene.
Answer the following statement true (T) or false (F)