A physician discovered a cancerous tumor in the cartilage of a patient. What type of tumor is this?
A. myeloma
B. retroviral
C. sarcoma
D. leukemia
E. cyst
C. sarcoma
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Which of the following can stimulate a reactivation of the virus that causes cold sores?
A. Ultraviolet light B. Physical stress (fever, cold winds, trauma, hormonal changes) C. Emotional stress D. All of the choices are correct.
Which substance was used by ancient organisms to produce energy?
a. Hydroxide b. Methane c. Carbohydrates d. Oxygen e. Water
A genetic strategy that starts with knowing the DNA sequence and works toward identifying an associated phenotype is known as ________
Fill in the blank(s) with correct word
In negative feedback, the variable being regulated is changed in the ________ direction, while in positive feedback the variable is changed in the ________ direction.
A. inhibitory; stimulatory B. decreasing; increasing C. same; opposite D. opposite; same E. negative; positive