Which element of the fibrous pericardium binds the base of the heart to the mediastinum?

A) reticular fibers
B) collagen fibers
C) skeletal muscle
D) elastic fibers
E) cartilage


Ans: B) collagen fibers

Biology & Microbiology

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Seeds may remain dormant ____, sprouting only when external conditions such as temperature and available moisture

favor the seedling’s growth.

a. up to days b. up to weeks c. up to months d. up to months or years e. for months, years, or even millennia

Biology & Microbiology

The chytrids in these micrographs are Batrachochytrium dendrobatidis. What reproductive form do chytrids use that distinguishes them from other fungi?


a. ascospores
b. zygospores
c. zoospores
d. basidiospores

Biology & Microbiology

When two true-breeding parental genotypes are crossed, the offspring are referred to as the

A. F1 generation. B. true recessives. C. F2 generation. D. test cross.

Biology & Microbiology

A section of liver stained with the Grocott stain shows diffuse black staining over the entire section, making it difficult to see organisms. This could most likely be corrected in the future by treating liver sections with:

a) decreased concentration of chromic acid b) diastase prior to beginning the stain c) a more dilute solution of methenamine silver d) a longer time in the gold chloride

Biology & Microbiology