The method that indicates the age of a substance by measuring the relative content of a radioisotope and its daughter

elements is called ____ dating.



a. fossil
b. radiometric
c. isotope
d. zircon
e. uranium


ANSWER: b

Biology & Microbiology

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The difference in the appearance of the male and the

female is known as a. polymorphism. b. sexual dimorphism. c. the dioecious condition. d. sexual selection. e. a primary sexual characteristic.

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Hormone leptin is produced by ____________________ cells.Fill in the blank(s) with the appropriate word(s)

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What is the main reason scientists use Latin scientific names?

A) All scientists speak Latin. B) Common names don't sound professional. C) Latin names are recognized worldwide, overcoming language barriers. D) Scientific publications are usually in Latin. E) Linnaeus was from Italy, so he spoke Latin.

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