The products of an endocrine gland:a
only affect their own tissues.
b. can have a digestive function.
c. always stimulate the target tissue.
d. generally have to travel to reach the target tissue.
e. are not produced by cells in organs, such as the heart.
D
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The unexpressed regions of split genes are called
A. exons. B. introns. C. endons. D. codons.
The organisms on the Galápagos Islands that were most important to the development of Darwin's theory of natural selection were
A. snails and fish. B. monkeys and armadillos. C. rabbits and hares. D. tortoises and finches. E. plants and fungi.
The first successful treatment of a genetic disorder by gene therapy was the curing of a 4-year-old girl who had severe combined immunodeficiency disease
Because the engineered cells did not live forever, this child supplemented her treatment with regular doses of A) adenosine deaminase (ADA). B) insulin. C) hemoglobin. D) bacteria. E) B lymphocytes.
Atropine, which is used to dilate the eye, inhibits acetylcholine muscarinic receptors.
a. true b. false