Of the following cell components, which is composed of protein fibers that provide shape and organization to eukaryotic cells?
A) DNA
B) Mitochondria
C) Golgi complex
D) Chromatin
E) Cytoskeleton
E
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Phage-encoded enzymes are
A. all produced simultaneously. B. produced in a sequential manner. C. strictly host enzymes. D. used to customize the cell for viral production. E. produced in a sequential manner AND used to customize the cell for viral production.
An epithelium is attached to the underlying surface by ________
a. gland cells b. microvilli c. connective tissue d. the basement membrane
All of the following statements describe characteristics of cancer cells EXCEPT which one?
A) Cancer cells may migrate to other locations in the body. B) Cancer cells often have an enlarged nucleus. C) Cancer cells lose the ability to control cell division. D) Cancer cells typically are overdifferentiated. E) Cancer cells no longer perform their specialized functions prior to becoming cancerous.
Density-independent factors:a
influence population size and are in turn influenced by changes in population density. b. may be the result of intense interspecific competition. c. are typically abiotic. d. may include parasites. e. may include diseases.