The Society That Was Able to Build Complex Agricultural Systems

question 69

Multiple Choice

The society that was able to build complex agricultural systems at 12,000 feet above sea level -- an unheard of task -- was

• A)Andean
• B)Mayan
• C)Aztec
• D)Incan
• E)African

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Definitions:

Neurotransmitter

A chemical substance that transmits signals across a synapse between neurons in the nervous system.

Genome

The complete set of DNA, including all of its genes, in an organism or cell.

Epigenetic Mark

A biological marker that is a result of changes in gene expression caused by mechanisms other than changes in the underlying DNA sequence.

DNA Molecule

The double-helix structure that contains the genetic instructions used in the development and functioning of all living organisms.