The human genome consists of about ________ chemical letters
A) 300,000
B) 1 million
C) 3 billion
D) 300 billion
C
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What is an organic compound?
A. A molecule that contains a nitrogen skeleton B. A molecule that contains both carbon and nitrogen C. A molecule that contains carbon bonded to other elements D. A molecule that contains nitrogen bonded to other elements
Acromegaly is the result of excessive secretion of which of the following by adults?
a. mineralocorticoid
b. glucocorticoid
c. thyroxine
d. testosterone
e. growth hormone
The blood-brain barrier consists of
a. membranes surrounding the neurons of the brain. b. cells lining the wall of the brain capillaries. c. vesicles of cerebrospinal fluid. d. the cerebral cortex. e. the meninges.
What is the reproductive organ of angiosperms?
A) Cones B) Flowers C) Seeds D) Fruits