Clines are created when

A) emigrants remove alleles and immigrants introduce alleles.

B) immigrants remove alleles and emigrants introduce alleles.

C) different genes mutate in different geographical regions.

D) men marry their nieces as part of their culture.


A) emigrants remove alleles and immigrants introduce alleles.

Biology & Microbiology

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The chemical digestion of proteins begins in the _____

A) mouth B) stomach C) small intestine D) bloodstream

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Denaturation disrupts the secondary and tertiary structure of proteins. However, denaturation is not strong enough to disrupt what interaction that is relevant to protein structure?

A. ionic bonds B. hydrophobic exclusion C. peptide bonds D. van der Waals attraction E. hydrogen bonds

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In the ________ circuit, blood leaving the ________ ultimately delivers oxygen and nutrients to all of the body's tissues and organs

A) pulmonary; lung capillaries B) systemic; vena cava C) pulmonary; myocardium D) systemic; left ventricle

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Which word best describes the thalamus?

A) processor B) reflexor C) regulator D) transmitter

Biology & Microbiology