The smallest difference in DNA sequence between a gene in two individuals is a single-nucleotide polymorphism (SNP)
Indicate whether the statement is true or false
TRUE
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Four of the five substances listed below are or
contain saturated fats. Select the exception. a. butter b. bacon grease c. oleic acid d. animal fat e. whole milk
Cell–cell communication in plants takes place via specialized structures called
A) plasmodesmata. B) chloroplast outer membrane pores. C) gap junctions. D) lipid rafts. E) connexons.
A centrosome is
a. a cylindrical structure made up of nine triplets of microtubules. b. a chromosomal region that connects sister chromatids during mitosis and attaches them to the spindle. c. a protein structure that binds centromeres and mediates the attachment of chromosomes to the spindle. d. the major microtubule-organizing center in animal cells.
Small molecules and ions can pass through gap junctions.
a. true b. false