The thymus plays a role in the immune system because
Answer: It is the site of the maturation of T cells
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Cancer can be considered an inherited disease if ____________________
a. at least one mutation is inherited b. a family member has some type of cancer c. all members of the family share the same gene d. a person inherits a tumor suppressor gene from one of his parents
How do the various membranes of a cell differ?
a. Only certain membranes are constructed of a selectively permeable membrane. b. Certain proteins are unique to each membrane. c. Phospholipids are found only in certain membranes. d. Only certain membranes are constructed from molecules with dual solubility.
Sometimes postmenopausal women are given a prescription for which of the following to help them maintain their bone calcium?
A) calcitonin B) parathyroid hormone C) insulin D) thyroid hormone
Most of the nitrogen in the environment is in the form of nitrogen gas, which is the form used by most organisms
Indicate whether the statement is true or false