In 2012, the International Olympic Committee began using tests that measure the levels and the body’s response to the
male hormone ____________________ as a means of distinguishing females from males when sex was que Fill in the blank(s) with the appropriate word(s).
testosterone
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Homologous chromosomes undergo recombination during
a. prophase II. b. metaphase I. c. metaphase II. d. both prophase I and II. e. prophase I.
A gene that has three or more alleles is called a ____
a. pleiotropic gene b. dominant gene c. multiple allele system d. trivalent gene e. polyvalent gene
The body uses atoms in different ways to accomplish different tasks. For example, one portion of the body's calcium supply strengthens bones, whereas another portion combines with proteins to stimulate blood clotting after tissue injury. Which of the
following statements provides the most logical chemical explanation of calcium's ability to perform such different functions? A) The bone contains calcium salts, which are less reactive than the calcium ions found in the blood. B) The calcium in blood is a more reactive form of the atom and therefore has fewer protons than the calcium in bone. C) There are many different isotopes of calcium, and the most reactive isotope is found in the bone. D) The calcium in blood has a lighter atomic mass than the calcium in bone and is in a more reactive form.
The loss of water from the leaves of plants is
A) adhesion. B) cohesion. C) transpiration. D) osmosis.