Which of the following does not produce ionizing radiation?
A. X-rays
B. nuclear fuel
C. radon gas
D. ultraviolet radiation
E. none of these are ionizing radiation
Answer: D
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Ecosystem diversity
A. is the diversity of animal species within a defined geographical area. B. is primarily associated with aquatic habitats. C. refers to the structure and function within an ecosystem. D. includes only species-rich ecosystems.
Which heart condition is the most dangerous?
a. Tachycardia b. Atherosclerosis c. Bradycardia d. Atrial fibrillation e. Ventricular fibrillation
If disease symptoms are associated with a genetically inherited allele, tests can be performed
A. on the fetus, during pregnancy. B. during the in utero fetal stage or any stage of life after birth. C. during adulthood. D. on the embryo prior to implantation. E. during childhood.
Four of the five choices listed below are possible
causes of extinction. Select the exception. a. asteroid impact b. conservation c. tectonic change d. human activity e. climate change