Gallstones are a problem when they:
A) break and release enzymes. B) break and release cholesterol.
C) block the cystic duct or common bile duct. D) get stuck in the folds of the small intestine.
Answer: C
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Recently a class of infectious proteins with no associated nucleic acid have been identified. They are referred to as
A. bacteriophages. B. latent viruses. C. viroids. D. prions. E. virions.
Which of the following eukaryotic organelles
are believed to have existed as independent prokaryotes in the past?
a. peroxisomes b. chloroplasts c. mitochondria d. lysosomes e. more than one of these
________ is the maximum population size that a particular habitat can support
A) Population cycle B) Carrying capacity C) Life history pattern D) Survivorship curve
Which basal angiosperm is believed to be the closest living relative of the first flowering plants?
A. Nuphar polysepala B. Magnolia grandiflora C. Amborella trichopoda D. Archaefructus sinensis E. Ginkgo biloba