The Florida panther, as a symbol of Florida's conservation campaign, serves as a(n)
A. indicator species.
B. flagship species.
C. endemic species.
D. keystone species.
E. umbrella species.
B. flagship species.
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Answer the following statements true (T) or false (F)
1. Most oncogenes encode proteins that function in cell growth signaling pathways. 2. Myc genes tend to be overexpressed in only a few forms of cancer. 3. p53 is a tumor suppressor gene that acts as a sensor of DNA damage. 4. Certain types of cancer are caused by viruses.
A cell is minimally defined by which of the following:
a. an organized chemical system. b. specialized molecules. c. a nucleus. d. a membrane. e. an organized chemical system and specialized molecules surrounded by a membrane.
Karyo types generally remain constant within a species because
A) rearrangements occur frequently. B) changes in chromosome number occur infrequently. C) genetic instabilities produced by genomic changes are usually at a selective disadvantage. D) genetic imbalances are often at a selective advantage.
Which of the following toxins produced by Bordetella pertussis results in the accumulation of excess mucus in the trachea?
A. pertussis toxin B. adenylate cyclase toxin C. tracheal cytotoxin D. both adenylate cyclase toxin and tracheal cytotoxin E. both pertussis toxin and adenylate cyclase toxin