Which among the following cultural traits is thought to be unique to modern humans?
A. Tool use and creation
B. Hunting for meat
C. Burial practices
D. Jewelry and adornment practices
E. Spoken language
Answer: E
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The maintenance of Hardy-Weinberg equilibrium is
predominant a. when sexual selection occurs. b. when mutations occur. c. in small populations. d. when there is no gene flow between different populations. e. when all of these are true.
What results when the surfactant in the lungs is affected by smoking?
A) increased respiratory surface area B) decreased gas exchange in the alveoli C) reduced ability of hemoglobin to carry oxygen D) increased concentrations of carbon monoxide
What is the cardiac cycle?
A) The movement of blood from the heart to the lungs and then back to the heart B) The movement of blood from systemic to pulmonary circulation C) The passage of electrical impulses from the AV node to the SN node to heart muscle D) The alternating relaxation and contraction of the heart chambers
All infections result in disease
Indicate whether the statement is true or false