What is the definition of neoteny?
A. retention of juvenile characteristics in an
adult
B. reaching reproductive maturity in a juvenile
C. the acquisition of complex language skills
in an adult
D. acquisition of adult characteristics in a
juvenile
E. accelerated aging in the adult
A
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The heartbeat originates in the:
A. sinoatrial node located at the junction of the vena cava and the right atrium. B. sinoatrial node located at the junction of the vena cava and the left atrium. C. atrioventricular node located in the wall of the atrioventricular valve. D. atrioventricular node located in the tissue separating the atria and ventricles. E. sinoatrial node and atrioventricular node simultaneously.
In a structural model of a molecule, a carbon atom may be represented by a ________
a. blue sphere only b. letter C or corner with no symbol c. corner with no printed symbol only d. black sphere only
Lack of ___ in a diet can cause ___
a. iron---hypothryroidism b. iodine---hypothryroidism c. iodine---hyperthryroidism d. iron---hyperthyroidism e. iodine---hypertension
In the accompanying diagram, ____ is labeled "C"
a. the appendix b. the cecum c. a polyp d. a portion of the small intestine e. the colon