Biology, 29.04.2021 08:00, mathman783
An isotope used for absolute dating has a half-life of 100,000 years. Laboratory analysis of a crystal, which originally formed with only the parent isotope present, is now found to have a parent-to-daughter ratio of 1 :3. How long has it been since the crystal formed? *
A. 33,000 years
B. 50,000 years
C. 200,000 years
D. 300,000 years
Answers: 2
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Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.
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Biology, 22.06.2019 07:50, darceline1574
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Answers: 2
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Answers: 1
An isotope used for absolute dating has a half-life of 100,000 years. Laboratory analysis of a cryst...
Mathematics, 09.10.2019 16:30