Atoms containing a specific number of protons are called:
A. molecules
B. minerals
C. metals
D. elements
D. elements
Biology & Microbiology
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One mechanism of genomic imprinting silences an allele by DNA ____
a. methylation b. mutation c. transposition d. deletion e. inversion
Biology & Microbiology
What characteristic does not describe a vertebrate?
a. notochord. b. backbone. c. exoskeleton. d. gills or lungs. e. posterior tail.
Biology & Microbiology
Resolution is the
A) ability of an optical instrument to show two close objects as separate. B) size of an image. C) ability of an optical instrument to magnify an image. D) distance between the lenses of a microscope.
Biology & Microbiology
The condition that exists when an organism gains or loses one or more chromosomes but not a complete haploid set is known as ________
A) triploidy B) euploidy C) polyploidy D) aneuploidy E) trisomy
Biology & Microbiology