Surplus individuals in the __________ disperse and find another habitat in which to settle and
reproduce.
a. metahabitats
b. sink habitats
c. source populations
d. source habitats
e. K-selected populations
D
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What is the main cause of cancer?
A. DNA replication no longer working properly B. Old age, during which the cells of the body no longer work properly C. Exposure to carcinogens in the environment D. We do not currently know the main cause of cancer.
You are an endocrinologist. A patient has been referred to you because he is cold all the time, even when the ambient temperature is 75°F. His throat is swollen. He also appears to heal slowly
You immediately suspect that his metabolic rate is slower than normal due to A) elevated calcitonin levels. B) elevated growth hormone levels. C) decreased parathyroid hormone levels. D) decreased thyroxine levels. E) elevated insulin levels.
Analysis of a patient's lung tumor reveals that all of the malignant cells in this tumor have a specific chromosomal abnormality involving a fusion event between two sets of chromosomes. This MOST likely suggests that
a) This mutation was inherited. b) The tumor is polyclonal. c) The tumor is monoclonal in origin. d) A large number of normal cells simultaneously underwent this mutation.
Experimental Manipulations
What will be an ideal response?