Our genetic information will be decided based on the order of nucleotides (G,C,A,T,) in our DNA.
a. true
b. false
a. true
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Cardiac muscle cells have gap junctions between adjacent cells. What is the function of those gap junctions?
A. They maintain isotonic conditions. B. They facilitate cell-cell adhesion. C. They are involved in cell-cell communication of the cells of the heart. D. They make nutrients, like glucose, readily available to the muscle cells of the entire heart.
Gut-dwelling ____ help cattle, sheep and related grazing animals break down ____ in plant material
a. ciliates; chlorophyll b. apicomplexans; cellulose c. dinoflagellates; cellulose d. dinoflagellates; chlorophyll e. ciliates; cellulose
Nondisjunction involving the X chromosomes may
occur during oogenesis and produce two kinds of eggs. If normal sperm fertilize these two types, which of the following pairs of genotypes are possible? a. XX and XY b. XXY and XO c. XYY and XO d. XYY and YO e. none of these
What member of the human intestinal microbiota occasionally causes life-threatening disease?
A) Escherichia coli O157:H7 B) Clostridium difficile C) Salmonella enterica D) Giardia intestinalis E) Lactobacillus