Turner syndrome is a
a. monosomy.
b. trisomy.
c. condition with the normal set of
chromosomes.
d. condition affecting only boys.
e. more than one of these.
A
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Genes are said to be linked when:
A. they lie on the same chromosome. B. they lie on the same chromosome and are greater than 50 map units apart. C. they lie on the same chromosome and are less than 50 map units apart. D. they are alleles of the same gene. E. None of these choices are correct.
How do exposed layers of sedimentary rock in the Grand Canyon reveal clues about the geologic time scale?
a. The chemical composition of each layer indicates the conditions on Earth when the layer was deposited. b. Fossils of soft-bodied animals are prevalent in sedimentary rock. c. Radiometric dating using 14C of fossils in each layer can accurately predict their age up one million years ago.
d. The chemical composition of each layer can be determined by radiometric dating. e. The oldest fossils are found near the surface, while the most recent fossils are found at deeper layers.
A sporophyte is a __________ plant body that grows
by __________ from a __________. a. haploid; mitosis; spore b. diploid; mitosis; spore c. diploid; mitosis; fertilized egg d. diploid; meiosis; fertilized egg e. haploid; mitosis; fertilized egg
Oxygen atoms in H2O In photosynthesis, the oxygen atoms in H2O are energized.
a) reduced. b) reformed into other elements. c) oxidized. d) broken down.