The Golgi apparatus is comprised of flattened, saclike structures called ________, which may be clustered in one region or scattered throughout the cell.
A. thylakoids
B. vesiculae
C. cristae
D. cisternae
Answer: D
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Most members of this lineage of Cnidarians have both polyp and medusa stages in their life cycles,
with the polyp stage typically forming a colony. Species of Obelia are members of this lineage.
a. Hydrozoa b. Scyphozoa c. Trematoda d. Cubozoa e. Anthozoa
Sharks differ from most other fish in that they
lack a. gill slits. b. scales. c. bone. d. paired appendages. e. teeth.
When membrane lipids are extracted from cells and used to prepare artificial lipid bilayers, cholesterol and sphingolipids tend to self-assemble into ________ that are more gelated and highly ordered than surrounding regions consisting primarily of _________.
a) microdomains, integral proteins b) microdomains, phosphoglycerides c) liquid crystals, microdomains d) liquid crystals, phosphoglycerides e) macrodomains, phosphoglycerides
Many times species are composed of networks of distinct populations called metapopulations. When do metapopulations occur?
A. When suitable habitat is patchily distributed and separated by areas of unsuitable habitat B. When a population is large and uniformly distributed C. When a population in poor habitat continually sends out dispersers to bolster populations in better habitats D. When a population in a better habitat does not send out colonizers into less suitable habitats